{"id":141168,"date":"2018-06-02T06:30:38","date_gmt":"2018-06-01T22:30:38","guid":{"rendered":"\/\/m.iemloyee.com\/?p=141168"},"modified":"2025-07-14T14:12:24","modified_gmt":"2025-07-14T06:12:24","slug":"141168","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=141168","title":{"rendered":"\u9502\u7535\u65b9\u5411\u60f3\u53d1\u597d\u6587\u7ae0\uff1f\u5e38\u89c1\u9502\u7535\u673a\u7406\u7814\u7a76\u65b9\u6cd5\u4e86\u89e3\u4e00\u4e0b\uff01"},"content":{"rendered":"

\"\"<\/a><\/p>\n

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\u5c0f\u7f16\u6839\u636e\u5e38\u89c1\u7684\u6750\u6599\u8868\u5f81\u5206\u6790\u5206\u4e3a\u56db\u4e2a\u5927\u7c7b\uff0c\u6750\u6599\u7ed3\u6784\u7ec4\u5206\u8868\u5f81\uff0c\u6750\u6599\u5f62\u8c8c\u8868\u5f81\uff0c\u6750\u6599\u7269\u7406\u5316\u5b66\u8868\u5f81\u548c\u7406\u8bba\u8ba1\u7b97\u5206\u6790\u3002<\/p>\n

\u6750\u6599\u7ed3\u6784\u7ec4\u5206\u8868\u5f81<\/strong><\/p>\n

\u76ee\u524d\u5728\u50a8\u80fd\u6750\u6599\u7684\u5e38\u7528\u7ed3\u6784\u7ec4\u5206\u8868\u5f81\u4e2d\u6d89\u53ca\u5230\u4e86XRD,NMR,XAS\u7b49\u5148\u8fdb\u7684\u8868\u5f81\u6280\u672f\uff0c\u6b64\u5916\u76ee\u524d\u7684\u7814\u7a76\u4e5f\u8d8a\u6765\u8d8a\u591a\u7684\u4ece\u975e\u539f\u4f4d\u7684\u8868\u5f81\u5411\u539f\u4f4d\u7684\u8868\u5f81\u8fdb\u884c\u8fc7\u6e21\u3002\u5229\u7528\u539f\u4f4d\u8868\u5f81\u7684\u5b9e\u65f6\u5206\u6790\u7684\u4f18\u52bf\uff0c\u6765\u63a2\u7a76\u6750\u6599\u5728\u53cd\u5e94\u8fc7\u7a0b\u4e2d\u53d1\u751f\u7684\u53d8\u5316\u3002\u6b64\u5916\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u7814\u7a76\u5de5\u4f5c\u5f00\u59cb\u6d89\u53ca\u4e86\u4f7f\u7528XAS\u7b49\u9700\u8981\u4f7f\u7528\u540c\u6b65\u8f90\u5c04\u6280\u672f\u7684\u8868\u5f81\uff0c\u800c\u62a2\u5360\u6709\u9650\u7684\u540c\u6b65\u8f90\u5c04\u5149\u6e90\u8d44\u6e90\u66f4\u663e\u5f97\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n

XANES<\/strong><\/p>\n

\u00a0X\u5c04\u7ebf\u5438\u6536\u8fd1\u8fb9\u7ed3\u6784\uff08XANES\uff09\u53c8\u79f0\u8fd1\u8fb9X\u5c04\u7ebf\u5438\u6536\u7cbe\u7ec6\u7ed3\u6784\uff08NEXAFS\uff09\uff0c\u662f\u5438\u6536\u5149\u8c31\u7684\u4e00\u79cd\u7c7b\u578b\u3002\u5728X\u5c04\u7ebf\u5438\u6536\u8c31\u4e2d\uff0c\u9608\u503c\u4e4b\u4e0a60eV\u4ee5\u5185\u7684\u4f4e\u80fd\u533a\u7684\u8c31\u51fa\u73b0\u5f3a\u7684\u5438\u6536\u7279\u6027,\u79f0\u4e4b\u4e3a\u8fd1\u8fb9\u5438\u6536\u7ed3\u6784(XANES)\u3002\u5b83\u662f\u7531\u4e8e\u6fc0\u53d1\u5149\u7535\u5b50\u7ecf\u53d7\u5468\u56f4\u539f\u5b50\u7684\u591a\u91cd\u6563\u5c04\u9020\u6210\u7684\u3002\u5b83\u4e0d\u4ec5\u53cd\u6620\u5438\u6536\u539f\u5b50\u5468\u56f4\u73af\u5883\u4e2d\u539f\u5b50\u51e0\u4f55\u914d\u7f6e\uff0c\u800c\u4e14\u53cd\u6620\u51dd\u805a\u6001\u7269\u8d28\u8d39\u7c73\u80fd\u7ea7\u9644\u8fd1\u4f4e\u80fd\u4f4d\u7684\u7535\u5b50\u6001\u7684\u7ed3\u6784\uff0c\u56e0\u6b64\u6210\u4e3a\u7814\u7a76\u6750\u6599\u7684\u5316\u5b66\u73af\u5883\u53ca\u5176\u7f3a\u9677\u7684\u6709\u7528\u5de5\u5177\u3002\u76ee\u524d\uff0c\u56fd\u5185\u7684\u540c\u6b65\u8f90\u5c04\u5149\u6e90\u88c5\u7f6e\u4e3b\u8981\u6709\u5317\u4eac\u540c\u6b65\u8f90\u5c04\u88c5\u7f6e\uff0c\uff08BSRF\uff0c\u7b2c\u4e00\u4ee3\u5149\u6e90\uff09\uff0c\u4e2d\u56fd\u79d1\u5b66\u6280\u672f\u5927\u5b66\u7684\u5408\u80a5\u540c\u6b65\u8f90\u5c04\u88c5\u7f6e \uff08NSRL\uff0c\u7b2c\u4e8c\u4ee3\u5149\u6e90\uff09\u548c\u4e0a\u6d77\u5149\u6e90\uff08SSRF\uff0c\u7b2c\u4e09\u4ee3\u5149\u6e90\uff09\uff0c\u5bf9\u56fd\u5185\u7684\u8bf8\u591a\u6750\u6599\u79d1\u5b66\u7684\u7814\u7a76\u8d77\u5230\u4e86\u5de8\u5927\u7684\u4f5c\u7528\u3002<\/p>\n

\u8fd1\u65e5\uff0c\u738b\u6d77\u826f\u8bfe\u9898\u7ec4\u5229\u7528XANES\u7b49\u5148\u8fdb\u8868\u5f81\u6280\u672f\u7814\u7a76\u5bcc\u542b\u7f3a\u9677\u7684\u5355\u6676\u8d85\u8584\u56db\u6c27\u5316\u4e09\u94b4\u7eb3\u7c73\u7247\u53ca\u5176\u7535\u5316\u5b66\u6027\u80fd\uff08Adv. Energy Mater. 2018, 8, 1701694\uff09, \u5982\u56fe\u4e00\u6240\u793a\u3002\u8be5\u7814\u7a76\u5de5\u4f5c\u5229\u7528\u4e86XANES\u7b49\u6280\u672f\u5206\u6790\u4e86\u5bcc\u542b\u7f3a\u9677\u7684\u56db\u6c27\u5316\u4e09\u94b4\u7684\u5316\u5b66\u73af\u5883\uff0c\u4ece\u800c\u8bc1\u660e\u4e86\u5176\u4e2d\u6c27\u7f3a\u9677\u7684\u5b58\u5728\u53ca\u5176\u76f8\u5bf9\u542b\u91cf\u3002\u6b64\u5916\u901a\u8fc7EAXFS\u8bc1\u660e\u4e86\u5bcc\u542b\u7f3a\u9677\u7684\u56db\u6c27\u5316\u4e09\u94b4\u4e2d\u7684Co\u5177\u6709\u66f4\u4f4e\u7684\u914d\u4f4d\u6570\u3002\u8fd9\u4e9b\u6761\u4ef6\u7684\u5b58\u5728\u5e2e\u52a9\u964d\u4f4e\u4e86\u8868\u9762\u80fd\uff0c\u4f7f\u6750\u6599\u5177\u6709\u826f\u597d\u7684\u7a33\u5b9a\u6027\u3002\u5229\u7528\u540c\u6b65\u8f90\u5c04\u6280\u672f\u6765\u8868\u5f81\u6750\u6599\u7684\u7f3a\u9677\uff0c\u5316\u5b66\u73af\u5883\u7528\u4e8e\u673a\u7406\u7684\u7814\u7a76\u5df2\u6210\u4e3a\u76ee\u524d\u7684\u7814\u7a76\u70ed\u70b9\u3002<\/p>\n

\"\"<\/a><\/p>\n

Figure 1. Analysis of O-vacancy defects on the reduced Co3<\/sub>O4<\/sub> nanosheets. (a) Co K-edge XANES spectra, indicating a reduced electronic structure of reduced Co3<\/sub>O4<\/sub>. (b) PDF analysis of pristine and reduced Co3<\/sub>O4<\/sub> nanosheets, suggesting a large variation of interatomic distances in the reduced Co3<\/sub>O4 <\/sub>structure. (c) Co K-edge EXAFS data and (d) the corresponding k3-weighted Fourier-transformed data of pristine and reduced Co3<\/sub>O4 <\/sub>nanosheets, demonstrating that O-vacancies have led to a defect-rich structure and lowered the local coordination numbers.<\/strong><\/p>\n

XRD<\/strong><\/p>\n

XRD\u5168\u79f0\u662fX\u5c04\u7ebf\u884d\u5c04\uff0c\u5373\u901a\u8fc7\u5bf9\u6750\u6599\u8fdb\u884cX\u5c04\u7ebf\u884d\u5c04\u6765\u5206\u6790\u5176\u884d\u5c04\u56fe\u8c31\uff0c\u4ee5\u83b7\u5f97\u6750\u6599\u7684\u7ed3\u6784\u548c\u6210\u5206\uff0c\u662f\u76ee\u524d\u7535\u6c60\u6750\u6599\u5e38\u7528\u7684\u7ed3\u6784\u7ec4\u5206\u8868\u5f81\u624b\u6bb5\u3002<\/p>\n

\u539f\u4f4dXRD\u6280\u672f\u662f\u5f53\u524d\u50a8\u80fd\u9886\u57df\u7814\u7a76\u4e2d\u91cd\u8981\u7684\u5206\u6790\u624b\u6bb5\uff0c\u5b83\u4e0d\u4ec5\u53ef\u6392\u9664\u5916\u754c\u56e0\u7d20\u5bf9\u7535\u6781\u6750\u6599\u4ea7\u751f\u7684\u5f71\u54cd\uff0c\u63d0\u9ad8\u6570\u636e\u7684\u771f\u5b9e\u6027\u548c\u53ef\u9760\u6027\uff0c\u8fd8\u53ef\u5bf9\u7535\u6781\u6750\u6599\u7684\u7535\u5316\u5b66\u8fc7\u7a0b\u8fdb\u884c\u5b9e\u65f6\u76d1\u6d4b\uff0c\u5728\u7535\u5316\u5b66\u53cd\u5e94\u7684\u5b9e\u65f6\u8fc7\u7a0b\u4e2d\u9488\u5bf9\u5176\u7ed3\u6784\u548c\u7ec4\u5206\u53d1\u751f\u7684\u53d8\u5316\u8fdb\u884c\u8868\u5f81\uff0c\u4ece\u800c\u53ef\u4ee5\u6709\u66f4\u660e\u786e\u7684\u5bf9\u4f53\u7cfb\u7684\u6574\u4f53\u53cd\u5e94\u8fdb\u884c\u5206\u6790\u548c\u5904\u7406\uff0c\u5e76\u63ed\u793a\u5176\u672c\u5f81\u53cd\u5e94\u673a\u5236\u3002\u56e0\u6b64\uff0c\u539f\u4f4dXRD\u8868\u5f81\u6280\u672f\u7684\u5f15\u5165\uff0c\u53ef\u63d0\u5347\u6211\u4eec\u5bf9\u7535\u6781\u6750\u6599\u50a8\u80fd\u673a\u5236\u7684\u7406\u89e3\uff0c\u5e76\u5c06\u5feb\u901f\u63a8\u52a8\u9ad8\u6027\u80fd\u50a8\u80fd\u5668\u4ef6\u7684\u53d1\u5c55\u3002<\/p>\n

\u76ee\u524d\uff0c\u9648\u5fe0\u4f1f\u8bfe\u9898\u7ec4\u5728\u5bf9\u9502\u786b\u7535\u6c60\u7684\u7814\u7a76\u4e2d\u53d6\u5f97\u4e86\u7a81\u7834\u6027\u7684\u8fdb\u5c55\uff0c\u7814\u7a76\u4eba\u5458\u4f7f\u7528\u539f\u4f4dXRD\u6280\u672f\u5bf9\u5c0f\u5206\u5b50\u84bd\u918c\u5316\u5408\u7269\u4f5c\u4e3a\u9502\u786b\u7535\u6c60\u6b63\u6781\u7684\u5145\u653e\u7535\u8fc7\u7a0b\u8fdb\u884c\u8868\u5f81\u5e76\u89e3\u91ca\u4e86\u5176\u53cd\u5e94\u673a\u7406\uff08NATURE COMMUN., 2018, 9, 705\uff09\uff0c\u5982\u56fe\u4e8c\u6240\u793a\u3002\u901a\u8fc7\u5404\u9879\u8868\u5f81\u8bc1\u5b9e\u4e86\u84bd\u918c\u5206\u5b50\u4e2d\u916e\u57fa\u5b98\u80fd\u56e2\u4e0e\u591a\u786b\u5316\u7269\u901a\u8fc7\u5f3a\u5316\u5b66\u5438\u9644\u4f5c\u7528\u5f62\u6210\u8def\u6613\u65af\u9178\u662f\u63d0\u5347\u9502\u786b\u7535\u6c60\u5faa\u73af\u7a33\u5b9a\u6027\u7684\u5173\u952e\u3002\u901a\u8fc7\u5728\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u5c0f\u5206\u5b50\u84bd\u918c\u4e0e\u53ef\u6eb6\u6027\u591a\u786b\u5316\u9502\u53d1\u751f\u201c\u5316\u5b66\u6027\u5438\u9644\u201d\uff0c\u5f62\u6210\u65e0\u6cd5\u6eb6\u89e3\u4e8e\u7535\u89e3\u6db2\u7684\u4e0d\u6eb6\u6027\u4ea7\u7269\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u6d3b\u6027\u7269\u8d28\u6d41\u5931\u7684\u6709\u6548\u6291\u5236\uff0c\u663e\u8457\u5730\u589e\u52a0\u4e86\u7535\u6c60\u7684\u5bff\u547d\u3002<\/p>\n

\"\"<\/a><\/p>\n

Fig. 2 In-situ XRD analysis of the interactions during cycling. <\/strong>\uff08<\/strong>a<\/strong>\uff09<\/strong>XRD intensity heat map from 4 o<\/sup> to 8.5o<\/sup> of a 2.4 mg cm\u20132<\/sup> cell\u2019s first cycle discharge at 54 mA g\u20131<\/sup> and charge at 187.5 mA g\u20131<\/sup>, where triangles=Li2<\/sub>S, square=AQ, asterisk=sulfur, and circle=potentially polysulfide 2\u03b8. (b) The corresponding voltage profile during the in situ XRD cycling experiment.<\/strong><\/p>\n

\u6750\u6599\u5f62\u8c8c\u8868\u5f81<\/strong><\/p>\n

\u5728\u6750\u6599\u79d1\u5b66\u7684\u7814\u7a76\u9886\u57df\u4e2d\uff0c\u5e38\u7528\u7684\u5f62\u8c8c\u8868\u5f81\u4e3b\u8981\u5305\u62ec\u4e86SEM\uff0cTEM\uff0cAFM\u7b49\u663e\u5fae\u955c\u6210\u50cf\u6280\u672f\u3002\u76ee\u524d\u6750\u6599\u7684\u5f62\u8c8c\u8868\u5f81\u5df2\u7ecf\u662f\u7edd\u5927\u591a\u6570\u6750\u6599\u79d1\u5b66\u7814\u7a76\u7684\u5fc5\u5907\u652f\u6491\u6570\u636e\uff0c\u4e00\u4e2a\u65b0\u9896\u4e14\u5f15\u4eba\u5165\u80dc\u7684\u5f62\u8c8c\u7535\u955c\u56fe\u4e5f\u662f\u53d1\u8868\u9ad8\u6c34\u5e73\u8bba\u6587\u7684\u4e0d\u4e8c\u6cd5\u95e8\u3002\u800c\u76ee\u524d\u7684\u7814\u7a76\u8bba\u6587\u4e5f\u8d8a\u6765\u8d8a\u591a\u5730\u96c6\u4e2d\u5728\u7eb3\u7c73\u6750\u6599\u7684\u7814\u7a76\u4e0a\uff0c\u5e76\u4f7f\u7528\u7403\u5deeTEM\u7b49\u8d85\u9ad8\u5206\u8fa8\u7387\u7684\u7535\u955c\u6765\u8868\u5f81\u7eb3\u7c73\u7ea7\u5c3a\u5bf8\u7684\u6750\u6599\uff0c\u901a\u8fc7\u9ad8\u5206\u8fa8\u7387\u7684\u7535\u955c\u8f85\u4ee5EDX, EELS\u7b49\u5143\u7d20\u5206\u6790\u7684\u63d2\u4ef6\u6765\u5206\u6790\u6d4b\u8bd5\uff0c\u4ee5\u6b64\u83b7\u5f97\u6e05\u6670\u7684\u56fe\u50cf\u548c\u6570\u636e\u5e76\u505a\u5206\u6790\u5904\u7406\u3002<\/p>\n

TEM<\/strong><\/p>\n

TEM\u5168\u79f0\u4e3a\u900f\u5c04\u7535\u5b50\u663e\u5fae\u955c\uff0c\u5373\u662f\u628a\u7ecf\u52a0\u901f\u548c\u805a\u96c6\u7684\u7535\u5b50\u675f\u6295\u5c04\u5230\u975e\u5e38\u8584\u7684\u6837\u54c1\u4e0a\uff0c\u7535\u5b50\u5728\u4e0e\u6837\u54c1\u4e2d\u7684\u539f\u5b50\u53d1\u751f\u78b0\u649e\u800c\u6539\u53d8\u65b9\u5411\uff0c\u4ece\u800c\u4ea7\u751f\u7acb\u4f53\u89d2\u6563\u5c04\u3002\u6563\u5c04\u89d2\u7684\u5927\u5c0f\u4e0e\u6837\u54c1\u7684\u5bc6\u5ea6\u3001\u539a\u5ea6\u76f8\u5173\uff0c\u56e0\u6b64\u53ef\u4ee5\u5f62\u6210\u660e\u6697\u4e0d\u540c\u7684\u5f71\u50cf\uff0c\u5f71\u50cf\u5c06\u5728\u653e\u5927\u3001\u805a\u7126\u540e\u5728\u6210\u50cf\u5668\u4ef6\u4e0a\u663e\u793a\u51fa\u6765\u3002\u5229\u7528\u539f\u4f4dTEM\u7b49\u6280\u672f\u53ef\u4ee5\u83b7\u5f97\u6750\u6599\u5f62\u8c8c\u548c\u7ed3\u6784\u5b9e\u65f6\u53d1\u751f\u7684\u53d8\u5316\uff0c\u5982\u5fae\u89c2\u7ed3\u6784\u7684\u8f6c\u5316\u6216\u8005\u5316\u5b66\u7ec4\u5206\u7684\u6539\u53d8\u3002\u5728\u9502\u786b\u7535\u6c60\u7684\u7814\u7a76\u4e2d\uff0c\u5229\u7528\u539f\u4f4dTEM\u6765\u89c2\u5bdf\u6750\u6599\u7684\u5f62\u8c8c\u548c\u7269\u76f8\u8f6c\u53d8\u5177\u6709\u91cd\u8981\u7684\u5b9e\u9645\u610f\u4e49\u3002Kim\u8bfe\u9898\u7ec4\u5728\u9502\u786b\u7535\u6c60\u7684\u6b63\u6781\u7814\u7a76\u4e2d\u5229\u7528\u539f\u4f4dTEM\u7b49\u5f62\u8c8c\u548c\u7ed3\u6784\u7684\u8868\u5f81\uff0c\u6df1\u5165\u7684\u7814\u7a76\u4e86\u6750\u6599\u7684\u7535\u5316\u5b66\u6027\u80fd\u4e0e\u5176\u5f62\u8c8c\u548c\u7ed3\u6784\u7684\u5173\u7cfb (Adv. Energy Mater., 2017, 7, 1602078.)\uff0c\u5982\u56fe\u4e09\u6240\u793a\u3002<\/p>\n

\u8be5\u5de5\u4f5c\u4f7f\u7528\u591a\u5b54\u78b3\u7eb3\u7c73\u7ea4\u7ef4\u786b\u590d\u5408\u6750\u6599\u4f5c\u4e3a\u9502\u786b\u7535\u6c60\u7684\u6b63\u6781\uff0c\u5728\u5927\u500d\u7387\u4e0b\u5145\u653e\u7535\u65f6\uff0c\u5229\u7528\u539f\u4f4dTEM\u89c2\u5bdf\u6750\u6599\u7684\u5f62\u8c8c\u53d8\u5316\u548c\u786b\u7684\u4f53\u79ef\u81a8\u80c0\uff0c\u63d0\u4f9b\u4e86\u65b0\u7684\u65b9\u6cd5\u53bb\u7814\u7a76\u786b\u7684\u7535\u5316\u5b66\u6027\u80fd\u5e76\u5c06\u5176\u4e0e\u4f53\u79ef\u81a8\u80c0\u6548\u5e94\u8054\u7cfb\u5728\u4e86\u4e00\u8d77\u3002<\/p>\n

\"\"<\/a><\/p>\n

Fig. <\/strong>3 Collected in-situ TEM images and corresponding SAED patterns with PCNF\/A550\/S, which presents the initial state, full lithiation state and high resolution TEM images of lithiated PCNF\/A550\/S and PCNF\/A750\/S.<\/strong><\/p>\n

\u6750\u6599\u7269\u7406\u5316\u5b66\u8868\u5f81<\/strong><\/p>\n

UV-vis<\/strong><\/p>\n

UV-vis spectroscopy\u5168\u79f0\u4e3a\u7d2b\u5916-\u53ef\u89c1\u5149\u5438\u6536\u5149\u8c31\u3002\u5438\u6536\u5149\u8c31\u53ef\u4ee5\u5229\u7528\u5438\u6536\u5cf0\u7684\u7279\u6027\u8fdb\u884c\u5b9a\u6027\u7684\u5206\u6790\u548c\u7b80\u5355\u7684\u7269\u8d28\u7ed3\u6784\u5206\u6790\uff0c\u6b64\u5916\u8fd8\u53ef\u4ee5\u7528\u4e8e\u7269\u8d28\u5438\u6536\u7684\u5b9a\u91cf\u5206\u6790\u3002UV-vis\u662f\u7b80\u4fbf\u4e14\u5e38\u7528\u7684\u5bf9\u65e0\u673a\u7269\u548c\u6709\u673a\u7269\u7684\u6709\u6548\u8868\u5f81\u624b\u6bb5\uff0c\u5e38\u7528\u4e8e\u5bf9\u6db2\u76f8\u53cd\u5e94\u4e2d\u7279\u5b9a\u7684\u4ea7\u7269\u53ca\u53cd\u5e94\u8fdb\u7a0b\u8fdb\u884c\u8868\u5f81\uff0c\u5982\u9502\u786b\u7535\u6c60\u4f53\u7cfb\u4e2d\u591a\u786b\u5316\u7269\u7684\u6d4b\u5b9a\u3002<\/p>\n

\u6700\u8fd1\uff0c\u664f\u6210\u6797\u8bfe\u9898\u7ec4\uff08Nano Lett., 2017, 17, 538-543\uff09\u5229\u7528\u539f\u4f4d\u7d2b\u5916-\u53ef\u89c1\u5149\u5149\u8c31\u7684\u53cd\u5c04\u6a21\u5f0f\u68c0\u6d4b\u9502\u786b\u7535\u6c60\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u591a\u786b\u5316\u7269\u7684\u5f62\u6210\uff0c\u6839\u636e\u56fe\u8c31\u4e2d\u4e0d\u540c\u4f4d\u7f6e\u7684\u5cf0\u5f3a\u5ea6\u5b9e\u65f6\u83b7\u5f97\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u591a\u786b\u5316\u7269\u79cd\u7c7b\u53ca\u542b\u91cf\u7684\u53d8\u5316\uff0c\u5982\u56fe\u56db\u6240\u793a\u3002\u7814\u7a76\u8005\u53d1\u73b0\u5f53\u6750\u6599\u4e2d\u5f15\u5165\u7852\u63ba\u6742\u65f6\uff0c\u9502\u786b\u7535\u6c60\u5728\u653e\u7535\u7684\u8fc7\u7a0b\u4e2d\u957f\u94fe\u591a\u786b\u5316\u7269\u7684\u751f\u6210\u91cf\u660e\u663e\u51cf\u5c11\uff0c\u4ece\u800c\u6709\u6548\u5730\u6291\u5236\u4e86\u591a\u786b\u5316\u7269\u7684\u7a7f\u68ad\u6548\u5e94\uff0c\u63d0\u9ad8\u4e86\u5e93\u4f26\u6548\u7387\u548c\u5bb9\u91cf\u4fdd\u6301\u7387\uff0c\u4e3a\u9502\u786b\u7535\u6c60\u7684\u673a\u7406\u7814\u7a76\u53ca\u5176\u5b9e\u7528\u5316\u5f00\u8f9f\u4e86\u65b0\u7684\u9014\u5f84\u3002<\/p>\n

\"\"<\/a><\/p>\n

Figure 4 (a\u2013f) in operando UV-vis spectra detected during the first discharge of a Li\u2013S battery (a) the battery unit with a sealed glass window for in operando UV-vis set-up. (b) Photographs of six different catholyte solutions; (c) the collected discharge voltages were used for the in situ UV-vis mode; (d) the corresponding UV-vis spectra first-order derivative curves of different stoichiometric compounds; the corresponding UV-vis spectra first-order derivative curves of (e) rGO\/S and (f) GSH\/S electrodes at C\/3, respectively. <\/strong><\/p>\n

\u7406\u8bba\u8ba1\u7b97\u5206\u6790<\/strong><\/p>\n

\u968f\u7740\u80fd\u6e90\u6750\u6599\u7684\u5927\u529b\u53d1\u5c55\uff0c\u8ba1\u7b97\u6750\u6599\u79d1\u5b66\u5982\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u8ba1\u7b97\uff0c\u5206\u5b50\u52a8\u529b\u5b66\u6a21\u62df\u7b49\u9886\u57df\u7684\u8ba1\u7b97\u8fd0\u7528\u4e5f\u5f97\u5230\u4e86\u5927\u5e45\u5ea6\u7684\u63d0\u5347\uff0c\u5982\u4eca\u5df2\u7ecf\u6210\u4e3a\u539f\u5b50\u5c3a\u5ea6\u4e0a\u6750\u6599\u8ba1\u7b97\u6a21\u62df\u7684\u91cd\u8981\u57fa\u7840\u548c\u6838\u5fc3\u6280\u672f\uff0c\u4e3a\u65b0\u6750\u6599\u7684\u7814\u53d1\u63d0\u4f9b\u624e\u5b9e\u7684\u7406\u8bba\u5206\u6790\u57fa\u7840\u3002<\/p>\n

\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u8ba1\u7b97\uff08DFT\uff09<\/strong><\/p>\n

\u5229\u7528DFT\u8ba1\u7b97\u53ef\u4ee5\u83b7\u5f97\u4f53\u7cfb\u7684\u80fd\u91cf\u53d8\u5316\uff0c\u4ece\u800c\u7528\u4e8e\u8ba1\u7b97\u6750\u6599\u4ece\u521d\u6001\u5230\u672b\u6001\u6240\u5177\u6709\u7684\u80fd\u91cf\u7684\u5dee\u503c\u3002\u901a\u8fc7\u4e0d\u540c\u7684\u4f53\u7cfb\u6216\u8005\u8ba1\u7b97\uff0c\u53ef\u4ee5\u5f97\u5230\u80fd\u91cf\u503c\u5982\u5438\u9644\u80fd\uff0c\u6d3b\u5316\u80fd\u7b49\u7b49\u3002\u6b64\u5916\u8fd8\u53ef\u7528\u5206\u5b50\u52a8\u529b\u5b66\u6a21\u62df\u53ca\u8499\u7279\u5361\u6d1b\u6a21\u62df\u6750\u6599\u7684\u52a8\u529b\u5b66\u884c\u4e3a\u53ca\u7ed3\u6784\u7279\u5f81\u3002\u8fd1\u65e5, Ceder\u8bfe\u9898\u7ec4\u5728\u65b0\u578b\u5bcc\u9502\u6750\u6599\u6b63\u6781\u7684\u7814\u7a76\u4e2d\uff08Nature 2018, 556, 185-190\uff09\u53d6\u5f97\u4e86\u91cd\u8981\u6210\u679c\uff0c\u5982\u56fe\u4e94\u6240\u793a\u3002\u8fd9\u9879\u7814\u7a76\u5229\u7528\u8499\u7279\u5361\u6d1b\u6a21\u62df\u8ba1\u7b97\u89e3\u91ca\u4e86Li2Mn2\/3Nb1\/3O2F \u6750\u6599\u5728\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u7684\u53d8\u5316\u53ca\u5176\u5bf9\u6750\u6599\u7ed3\u6784\u548c\u5316\u5b66\u73af\u5883\u7684\u5f71\u54cd\u3002\u8be5\u9879\u7814\u7a76\u4e5f\u4e3a\u9ad8\u6027\u80fd\u5bcc\u9530\u6b63\u6781\u62d3\u5bbd\u4e86\u5176\u5728\u7535\u6c60\u9886\u57df\u7684\u65b0\u7684\u5e94\u7528\u3002<\/p>\n

\"\"<\/a><\/p>\n

Fig. 5 Ab initio calculations of the redox mechanism of Li2<\/sub>Mn2\/3<\/sub>Nb1\/3<\/sub>O2<\/sub>F. manganese (a) and oxygen (b) average oxidation state as a function of delithiation (x in Li2-x<\/sub>Mn2\/3<\/sub>Nb1\/3<\/sub>O2<\/sub>F) and artificially introduced strain relative to the discharged state (x = 0). c, Change in the average oxidation state of Mn atoms that are coordinated by three or more fluorine atoms and those coordinated by two or fewer fluorine atoms. d, Change in the average oxidation state of O atoms with three, four and five Li nearest neighbours in the fully lithiated state (x = 0). The data in c and d were collected from model structures without strain and are representative of trends seen at all levels of strain. The expected average oxidation state given in a-d is sampled from 12 representative structural models of disordered-rocksalt Li2<\/sub>Mn2\/3<\/sub>Nb1\/3<\/sub>O2<\/sub>F, with an error bar equal to the standard deviation of this value. e, A schematic band structure of Li2<\/sub>Mn2\/3<\/sub>Nb1\/3<\/sub>O2<\/sub>F.<\/strong><\/p>\n

\u5c0f\u7ed3<\/strong><\/p>\n

\u76ee\u524d\u9502\u79bb\u5b50\u7535\u6c60\u53ca\u5176\u4ed6\u7535\u6c60\u9886\u57df\u7684\u7814\u7a76\u4f9d\u7136\u662f\u5982\u706b\u5982\u837c\u3002\u7136\u800c\u5927\u90e8\u5206\u7814\u7a76\u8bba\u6587\u4ecd\u7136\u96c6\u4e2d\u5728\u4f7f\u7528\u5e38\u89c4\u7684\u8868\u5f81\u5bf9\u6750\u6599\u8fdb\u884c\u5206\u6790\uff0c\u4e00\u4e9b\u673a\u7406\u5f88\u96be\u88ab\u5e38\u89c4\u7684\u8868\u5f81\u8bbe\u5907\u6240\u53d6\u5f97\u7684\u6570\u636e\u6240\u8bc1\u660e\uff0c\u6b64\u5916\u6709\u6df1\u5ea6\u7684\u673a\u7406\u7684\u7814\u7a76\u8fd8\u6709\u5f85\u6df1\u5165\u6316\u6398\u3002\u56e0\u6b64\u80fd\u6df1\u5165\u7684\u7814\u7a76\u6750\u6599\u4e2d\u7684\u53cd\u5e94\u673a\u7406\uff0c\u7ed3\u5408\u4f7f\u7528\u9ad8\u96be\u5ea6\u7684\u5b9e\u9a8c\u5de5\u4f5c\u5e76\u4f7f\u7528\u539f\u4f4d\u8868\u5f81\u7b49\u6709\u529b\u7684\u6280\u672f\u624b\u6bb5\u6765\u5b9e\u65f6\u76d1\u6d4b\u53cd\u5e94\u8fc7\u7a0b\uff0c\u540c\u65f6\u52a0\u5927\u529b\u5ea6\u505a\u57fa\u7840\u7814\u7a76\u5e76\u5168\u9762\u89e3\u91ca\u53cd\u5e94\u673a\u7406\u662f\u53d1\u8868\u9ad8\u6c34\u5e73\u6587\u7ae0\u7684\u4e3b\u8981\u9014\u5f84\u3002\u6b64\u5916\uff0c\u7ed3\u5408\u5404\u79cd\u7814\u7a76\u624b\u6bb5\uff0c\u4e0e\u591a\u5b66\u79d1\u9886\u57df\u76f8\u7ed3\u5408\u3001\u76f8\u4e92\u4f50\u8bc1\u7ed9\u51fa\u5b8c\u7f8e\u7684\u5b9e\u9a8c\u8bc1\u636e\u6765\u8bc1\u660e\u81ea\u5df1\u7684\u89c2\u70b9\u66f4\u663e\u5f97\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u4e13\u680f\u79d1\u6280\u987e\u95ee\u7f57\u535a\u58eb\u4f9b\u7a3f\u3002<\/p>\n

\u76f8\u5173\u6587\u7ae0\uff1a\u50ac\u5316\u60f3\u53d1\u597d\u6587\u7ae0\uff1f\u5e38\u89c1\u50ac\u5316\u673a\u7406\u7814\u7a76\u65b9\u6cd5\u4e86\u89e3\u4e00\u4e0b\uff01<\/a><\/p>\n

\u5982\u679c\u60a8\u60f3\u5229\u7528\u7406\u8bba\u8ba1\u7b97\u6765\u89e3\u6790\u9502\u7535\u6c60\u673a\u7406\uff0c\u6b22\u8fce\u60a8\u4f7f\u7528\u6750\u6599\u4eba\u8ba1\u7b97\u6a21\u62df\u89e3\u51b3\u65b9\u6848\u3002\u6750\u6599\u4eba\u7ec4\u5efa\u4e86\u4e00\u652f\u6765\u81ea\u5168\u56fd\u77e5\u540d\u9ad8\u6821\u8001\u5e08\u53ca\u4f01\u4e1a\u5de5\u7a0b\u5e08\u7684\u79d1\u6280\u987e\u95ee\u56e2\u961f\uff0c\u4e13\u6ce8\u4e8e\u4e3a\u5927\u5bb6\u89e3\u51b3\u5404\u7c7b\u8ba1\u7b97\u6a21\u62df\u9700\u6c42\u3002\u5982\u679c\u60a8\u6709\u9700\u6c42\uff0c\u6b22\u8fce\u626b\u4ee5\u4e0b\u4e8c\u7ef4\u7801\u63d0\u4ea4\u60a8\u7684\u9700\u6c42\uff0c\u6216\u76f4\u63a5\u8054\u7cfb\u5fae\u4fe1\u5ba2\u670d\uff08\u5fae\u4fe1\u53f7\uff1acailiaoren001\uff09<\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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