{"id":203344,"date":"2020-06-09T06:20:12","date_gmt":"2020-06-08T22:20:12","guid":{"rendered":"\/\/m.iemloyee.com\/?p=203344"},"modified":"2020-06-08T22:26:58","modified_gmt":"2020-06-08T14:26:58","slug":"%e5%8e%9f%e5%ad%90%e5%b0%ba%e5%af%b8%ef%bc%88haadf-stem%ef%bc%89%e6%8e%a2%e7%a9%b6%e7%a3%b7%e9%85%b8%e4%ba%9a%e9%93%81%e9%94%82%ef%bc%88lifepo4%ef%bc%89%e5%ae%b9%e9%87%8f-%e7%94%b5%e5%8e%8b%e8%a1%b0","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=203344","title":{"rendered":"\u539f\u5b50\u5c3a\u5bf8\uff08HAADF-STEM\uff09\u63a2\u7a76\u78f7\u9178\u4e9a\u94c1\u9502\uff08LiFePO4\uff09\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u673a\u7406"},"content":{"rendered":"

\u3010\u5f15\u8a00\u3011<\/strong><\/p>\n

\u6a44\u6984\u77f3\u578b LiFePO4<\/sub>\uff08LFP\uff09\u5177\u6709\u6210\u672c\u4f4e\u3001\u70ed\u7a33\u5b9a\u6027\u9ad8\u3001\u5faa\u73af\u7a33\u5b9a\u6027\u597d\u7b49\u4f18\u70b9\uff0c\u88ab\u8ba4\u4e3a\u662f\u4e00\u79cd\u5f88\u6709\u5e94\u7528\u524d\u666f\u7684\u9502\u79bb\u5b50\u7535\u6c60\u6b63\u6781\u6750\u6599\u3002\u7136\u800c LFP \u7684\u7535\u5b50\u5bfc\u7535\u6027\u5dee\uff0c\u9502\u79bb\u5b50\u6269\u6563\u6548\u7387\u4e5f\u4e0d\u9ad8\uff0c\u5236\u7ea6\u4e86\u5176\u5b9e\u9645\u5e94\u7528\u3002\u901a\u8fc7\u8868\u9762\u5305\u8986\u5bfc\u7535\u6027\u597d\u7684\u78b3\u6750\u6599\u3001\u4e0e\u5bfc\u7535\u6027\u4f18\u5f02\u7684\u6750\u6599\u590d\u5408\u3001\u8868\u9762\u63ba\u6742\u6216\u8005\u7eb3\u7c73\u5316\u7b49\u9014\u5f84\uff0c\u8f83\u597d\u89e3\u51b3\u4e86LFP \u7684\u4e0a\u8ff0\u95ee\u9898\uff0c\u4fc3\u8fdb\u4e86LFP\u7684\u4ea7\u4e1a\u5316\u5e94\u7528\u3002\u5c3d\u7ba1\u5982\u6b64\uff0c<\/strong>LFP <\/strong>\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u5bb9\u91cf<\/strong>\/<\/strong>\u7535\u538b\u8870\u9000\u4f9d\u7136\u5b58\u5728\uff0c\u5bf9\u5e94\u7684\u673a\u7406\uff08\u5c24\u5176\u5728\u539f\u5b50\u5c3a\u5bf8\uff09\u4f9d\u7136\u6709\u5f85\u8fdb\u4e00\u6b65\u5730\u4e30\u5bcc\u3002<\/strong><\/p>\n

\u3010\u6210\u679c\u4ecb\u7ecd\u3011<\/strong><\/p>\n

\u8fd1\u65e5\uff0c\u897f\u5357\u77f3\u6cb9\u5927\u5b66\u674e\u661f\u6559\u6388\u56e2\u961f\u4e0e\u5317\u4eac\u5927\u5b66\u5c48\u53ef\u535a\u58eb\uff08\u7269\u7406\u5b66\u9662\u9ad8\u9e4f\u7814\u7a76\u5458\u56e2\u961f\uff09\u53ca<\/strong>The University of Texas at Austin<\/em><\/strong>\u7684<\/strong>David Mitlin<\/strong>\u6559\u6388<\/strong>\u5408\u4f5c\u5229\u7528\u9ad8\u89d2\u73af\u5f62\u6697\u573a\u626b\u63cf\u900f\u5c04\u7535\u5b50\u663e\u5fae\u955c\uff08HAADF-STEM\uff09\u5728\u539f\u5b50\u5c3a\u5bf8\u7cfb\u7edf\u8003\u5bdf\u4e86LFP\u5728\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u4e2d\u7684\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u673a\u7406\u3002\u7814\u7a76\u91c7\u7528\u5546\u54c1\u5316\u78b3\u5305\u8986\u78f7\u9178\u4e9a\u94c1\u9502\uff08LFP\/C\uff09\u4f5c\u4e3aBaseline\u6837\u54c1\uff0c\u9009\u62e9\u5e38\u89c1\u7684\u5bfc\u7535\u6027\u805a\u5408\u7269—\u805a\u5421\u54af\uff08PPy\uff09\u53ca\u9530\uff08Mn\uff09\u63ba\u6742\u5206\u522b\u5bf9\u5546\u54c1LFP\/C\u6837\u54c1\u8868\u9762\u8fdb\u4e00\u6b65\u4fee\u9970\u4f5c\u4e3a\u5bf9\u6bd4\u7814\u7a76\u5bf9\u8c61\u3002\u5728\u524d\u671f\u7684\u7814\u7a76\u5de5\u4f5c\u4e2d\uff0c\u7814\u7a76\u4eba\u5458\u53d1\u73b0<\/strong>PPy<\/strong>\u5305\u8986<\/strong>LFP<\/strong>\u540e\u53ef\u4ee5\u6709\u6548\u63d0\u5347\u5176\u500d\u7387\u6027\u80fd\uff0c\u8fd9\u53ef\u4ee5\u8f83\u5bb9\u6613\u7406\u89e3\u4e3a<\/strong>PPy<\/strong>\u63d0\u9ad8\u4e86<\/strong>LFP<\/strong>\u8868\u9762\u7535\u5b50\u5bfc\u7535\u6027\u8fdb\u800c\u63d0\u5347\u5176\u500d\u7387\u6027\u80fd\uff0c\u4f46\u662f\u4f3c\u4e4e\u5ffd\u7565\u4e86<\/strong>PPy<\/strong>\u5305\u8986\u63d0\u5347<\/strong>LFP<\/strong>\u5faa\u73af\u7a33\u5b9a\u6027\u7684\u89e3\u91ca<\/strong>\u3002\u91c7\u7528HAADF-STEM\u8003\u5bdf\uff0c\u9996\u6b21\u4ece\u539f\u5b50\u5c3a\u5bf8\u4e0a\u63ed\u793a\u4e86<\/strong>LFP<\/strong>\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u5bb9\u91cf<\/strong>\/<\/strong>\u7535\u538b\u8870\u9000\u7684\u673a\u5236\u662f\u7531\u4e8e\u8868\u9762\u975e\u6676\u5316\uff0c\u51fa\u73b0\u975e\u6d3b\u6027\u3001\u4e0d\u53ef\u9006\u3001\u65e0\u5b9a\u578b\u6001<\/strong> FePO4<\/sub><\/strong>\uff0c<\/strong>\u800c\u4e14\u968f\u7740\u5faa\u73af\u6b21\u6570\u7684\u589e\u52a0\u5176\u8fd8\u4f1a\u5927\u91cf\u589e\u52a0\u5e76\u8fdb\u4e00\u6b65\u5c40\u90e8\u5ef6\u4f38\u5230LFP\u7684\u4f53\u76f8\u3002DFT\u8ba1\u7b97\u8868\u660e\uff0c\u9502\u79bb\u5b50\u5728FePO4<\/sub>\u4e2d\u7684\u6269\u6563\u7cfb\u6570\u4ec5\u4e3a2.5\u00d710-22 <\/sup>cm2 <\/sup>s-1<\/sup>\u3002\u975e\u6d3b\u6027\u3001\u65e0\u5b9a\u578b\u6001<\/strong> FePO4<\/sub><\/strong>\u7684\u51fa\u73b0\u4f1a\u5bfc\u81f4<\/strong>LFP<\/strong>\u5bb9\u91cf\u53ca\u7535\u538b\u8870\u9000\uff0c\u800c\u4e14\u968f\u7740\u5faa\u73af\u6b21\u6570\u7684\u589e\u52a0\uff0c\u8fd9\u4e00\u73b0\u8c61\u4f1a\u9010\u6e10\u52a0\u5267\u3002<\/strong>\u5bfc\u81f4LFP\u8868\u9762\u975e\u6676\u5316\u7684\u4e3b\u8981\u539f\u56e0\u662f\u7531\u4e8e\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u4e2d\u516d\u6c1f\u78f7\u9178\u9502\u57fa\u7535\u89e3\u6db2\u4e0d\u65ad\u4fb5\u8680\u53ca Fe \u5143\u7d20\u7684\u6eb6\u51fa\u3002Fe\u5143\u7d20\u6eb6\u51fa\u540e\uff0c\u4f1a\u8fc1\u79fb\u5230\u8d1f\u6781\u3001\u50ac\u5316\u8d1f\u6781 SEI \u7684\u5feb\u901f\u751f\u957f\uff0c\u4e5f\u4f1a\u5bfc\u81f4\u7535\u6c60\u6781\u5316\u7684\u6025\u5267\u589e\u5927\uff08\u5bf9\u4e8e\u7814\u7a76\u9502\u91d1\u5c5e\u7535\u6c60LFP||Li\u53ef\u80fd\u4e5f\u4f1a\u6709\u4e00\u5b9a\u542f\u53d1\uff09\u3002PPy <\/strong>\u539f\u4f4d\u5305\u8986<\/strong>LFP<\/strong>\u540e\uff0c\u80fd\u591f\u4e0e\u539f\u6709\u7684\u78b3\u5305\u8986\u5c42\u4e00\u9053\u5f62\u6210\u66f4\u52a0\u81f4\u5bc6\u7684\u4fdd\u62a4\u5c42\uff0c\u80fd\u591f\u6709\u6548\u9694\u5f00<\/strong> LFP<\/strong>\u4e0e\u7535\u89e3\u6db2\u7684\u76f4\u63a5\u63a5\u89e6<\/strong>\uff0c\u4ece\u800c\u8d77\u5230\u6709\u6548\u6291\u5236LFP\u5728\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u7684\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u3002\u6b64\u5916\uff0c\u591a\u79cd\u8868\u5f81\u624b\u6bb5\u7ed3\u5408\u8bc1\u5b9e\u4e86<\/strong>Mn<\/strong>\u80fd\u591f\u90e8\u5206\u5360\u636e<\/strong>Fe<\/strong>\u7684\u4f4d\u7f6e\uff0c\u5f62\u6210\u4ece\u5916\u5230\u5185<\/strong>Mn<\/strong>\u542b\u91cf\u9010\u6e10\u964d\u4f4e\u7684\u68af\u5ea6\u63ba\u6742\uff0c\u63ba\u6742\u6df1\u5ea6\u4e3a<\/strong>10-15nm<\/strong>\u3002<\/strong>DFT<\/strong>\u8ba1\u7b97\u8868\u660e\uff0c<\/strong>10-15nm<\/strong>\u7684<\/strong>LiMnx<\/sub>Fe1-x<\/sub>PO4<\/sub><\/strong>\uff08<\/strong>LMFP<\/strong>\uff09\u63ba\u6742\u5c42\u5177\u6709\u66f4\u9ad8\u7684\u70ed\u7a33\u5b9a\u6027\uff0c\u8010\u53d7\u7535\u89e3\u6db2\u4fb5\u8680<\/strong>\uff0c\u56e0\u6b64\u4e5f\u80fd\u6709\u6548\u8d77\u5230\u6291\u5236LFP\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u4e2d\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u7684\u4f5c\u7528\u3002\u4e0a\u8ff0\u5de5\u4f5c\u4e0d\u4ec5\u4ece\u539f\u5b50\u5c3a\u5bf8\u8fdb\u4e00\u6b65\u4e30\u5bcc\u4e86<\/strong>LFP<\/strong>\u5728\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u4e2d\u7684\u5bb9\u91cf<\/strong>\/<\/strong>\u7535\u538b\u8870\u9000\u673a\u7406\uff0c\u5bf9<\/strong>LFP<\/strong>\u7684\u5e94\u7528\u4e5f\u6709\u5b9e\u9645\u6307\u5bfc\u610f\u4e49\uff0c\u5373\u5bf9\u78b3\u5305\u8986\u78f7\u9178\u4e9a\u94c1\u9502\u8868\u9762\u4f5c\u8fdb\u4e00\u6b65\u8868\u9762\u4fee\u9970\uff08\u6216\u591a\u79cd\u8868\u9762\u4fee\u9970\u624b\u6bb5\u8054\u5408\uff09\uff0c\u5982\u5bfc\u7535\u805a\u5408\u7269\u5305\u8986\u6216\u8005\u63ba\u6742\u7b49\uff0c\u5f62\u6210\u66f4\u81f4\u5bc6<\/strong>\/<\/strong>\u7a33\u5b9a\u7684\u8868\u9762\u4fdd\u62a4\u5c42\uff0c\u53ef\u4ee5\u83b7\u5f97\u7535\u5316\u5b66\u6027\u80fd\u66f4\u52a0\u4f18\u5f02\u7684<\/strong>LFP<\/strong>\uff0c\u52a9\u529b\u5176\u5728\u50a8\u80fd\u6216\u8005\u52a8\u529b\u7535\u6c60\u4e2d\u7684\u66f4\u4f18\u5f02\u6027\u80fd\u8868\u73b0\u3002<\/strong><\/p>\n

\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n

Fig.1<\/strong>\u76f4\u89c2\u5c55\u73b0\u4e86PPy\u5bf9\u78b3\u5305\u8986\u78f7\u9178\u4e9a\u94c1\u9502\u7684\u8868\u9762\u8fdb\u4e00\u6b65\u539f\u4f4d\u4fee\u9970\u540e\u53ef\u4ee5\u5f62\u6210\u66f4\u52a0\u81f4\u5bc6\u7684\u8868\u9762\u4fdd\u62a4\u5c42\u3002<\/p>\n

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Figure 1. (a)<\/strong> HRTEM of the as-synthesized LFP surface. (b)<\/strong> HAADF-STEM micrographs of LFP surface and (c)<\/strong> bulk, oriented along [010] zone axis. (d) <\/strong>Atomic model of the Olivine structure of LFP oriented in [010] zone axis. (e)<\/strong> \u2013 (h) <\/strong>Analogous TEM analysis, but for PPy-LFP. XPS high resolution spectra of Fe 2p, P 2p, C 1s and N 1s for pristine LFP (I – l)<\/strong> and as-synthesized PPy-LFP (m – p)<\/strong>, respectively.<\/p>\n

Fig.2<\/strong>\u8868\u660ePPy\u5305\u8986\u540e\u80fd\u591f\u663e\u8457\u63d0\u5347\u78b3\u5305\u8986LFP\u7684\u5faa\u73af\u7a33\u5b9a\u6027\u53ca\u500d\u7387\u6027\u80fd\uff0c\u80fd\u591f\u6709\u6548\u6291\u5236\u5bb9\u91cf\/\u7535\u538b\u53ca\u9502\u79bb\u5b50\u6269\u6563\u7cfb\u6570\u7684\u8870\u51cf\u3002<\/p>\n

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Figure 2. (a) <\/strong>– (b) <\/strong>Galvanostatic charge-discharge curves of LFP and PPy-LFP, tested for 500 cycles at 1C (170 mAh g-1<\/sup>) between 2.5 and 4.2 V vs. Li\/Li+<\/sup>. (c)<\/strong> Cycling performance of LFP and PPy-LFP at 1C, after 3 formation cycles at C\/10. (d) <\/strong>Master plot showing the rate capability difference in LFP vs. PPy-LFP. (e)<\/strong> Charge transfer and SEI impedance values obtained from fits of Nyquist Plots at different cycle. (f)<\/strong> Solid-state Li+<\/sup> diffusivity values obtained from Warburg impedance, as a function of cycle number.<\/p>\n

Fig.3<\/strong>\u76f4\u89c2\u5c55\u793a\u4e86LFP\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u7684\u673a\u7406\u662f\u7531\u4e8e\u8868\u9762\u51fa\u73b0\u975e\u6d3b\u6027\u3001\u4e0d\u53ef\u9006\u3001\u65e0\u5b9a\u578b\u6001FePO4<\/sub>\uff0cPPy\u8868\u9762\u4fee\u9970\u53ef\u4ee5\u6709\u6548\u6291\u5236\u8fd9\u4e00\u73b0\u8c61\u7684\u53d1\u751f\u3002<\/p>\n

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Figure 3. <\/strong>Atomic structure after 500 cycles at 1C. (a) <\/strong>HRTEM images of LFP, with regions for near-surface (b)<\/strong> and bulk (c)<\/strong> identified by rectangles. (d)<\/strong> EELS line scan comparison of near-surface and bulk LFP. (e) \u2013 (g) <\/strong>HAADF-STEM images of the PPy-LFP near-surface and bulk structure. (f) <\/strong>An enlarged micrograph of the PPy-LFP near-surface structure, which remains crystalline but with evidence of Li(Fe) mutual occupation. (g) <\/strong>Structure of bulk PPy-LFP. (h) <\/strong>Atomic models for Olivine structure in PPy-LFP, comparing near-surface structure (top) to bulk (bottom).<\/p>\n

Fig.4<\/strong>\u5c55\u793a\u4e86DFT\u8ba1\u7b97\u4e2d\u9502\u79bb\u5b50\uff08Li+<\/sup>\uff09\u5728\u78f7\u9178\u4e9a\u94c1\u9502\u53ca\u78f7\u9178\u94c1\u4e2d\u7684\u6269\u6563\u8def\u5f84\u6a21\u578b\u3002<\/p>\n

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Figure 4.<\/strong> Lithium ion diffusion paths in (a) <\/strong>pristine Olivine LiFePO4<\/sub>, (b)<\/strong> amorphized FePO4<\/sub> (top) and LiFePO4 <\/sub>(bottom). Color codes: brown = Fe, gray = P, red = O, green = Li, and purple = diffused Li.<\/p>\n

Fig.5<\/strong>\u76f4\u89c2\u5c55\u793a\u4e86\u4ece\u6b63\u6781\u6eb6\u89e3\u51fa\u7684Fe\u5143\u7d20\u5bf9\u8d1f\u6781SEI\u819c\u7684\u5f71\u54cd\u3002\u663e\u7136\uff0cPPy\u5305\u8986\u540e\u53ef\u4ee5\u6709\u6548\u6291\u5236Fe\u7684\u6eb6\u51fa\uff0c\u5bf9\u5e94\u8d1f\u6781\u7684SEI\u819c\u8868\u9762\u66f4\u5e73\u6574\u3002\u95f4\u63a5\u8bc1\u660e\u4e86PPy\u53ca\u78b3\u5305\u8986\u5171\u540c\u4f5c\u7528\u53ef\u4ee5\u66f4\u597d\u7684\u4fdd\u62a4LFP\u4e0d\u88ab\u7535\u89e3\u6db2\u4fb5\u8680\u3002<\/p>\n

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Figures 5. <\/strong>SEM and XPS analysis of post 500 cycled Li metal anodes, the XPS analysis corresponding to the SEI chemistry. Panels (a)<\/strong> \u2013 (j) <\/strong>show tested against LFP, panels (k)<\/strong> \u2013 (t) <\/strong>show anode tested against PPy-LFP. SEM analysis shows top down images and EDX elemental mapping of O, P, F and Fe. XPS spectra shows survey, Fe 2p, F 1s, P 2p and O 1s.<\/p>\n

Fig.6<\/strong>\u5728\u539f\u5b50\u5c3a\u5bf8\u5c55\u793aLFP\/C\u53caMn\u63ba\u6742LFP\/C\u3002Mn\u63ba\u6742\u4e0d\u4f1a\u5f71\u54cdLFP\u7684\u6a44\u6984\u77f3\u578b\u6676\u4f53\u7ed3\u6784\u3002<\/p>\n

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Figure 6(a)<\/strong> – (b)<\/strong> HAADF-STEM micrographs of LFP surface and bulk, oriented along [010] zone axis. (c)<\/strong> Atomic model of the Olivine structure of LFP oriented in [010] zone axis. (d)<\/strong> – (f) <\/strong>Analogous HAADF-STEM micrographs and atomic model, but for Mn doped LFP (Mn-LFP). (g) <\/strong>– (k)<\/strong> HAADF-STEM micrograph of Mn-LFP and the corresponding EDS mapping of Fe, P, Mn and O.<\/p>\n

Fig.7<\/strong>\u4eceMn\u7684\u5316\u5b66\u73af\u5883\uff08\u7ed3\u5408\u80fd\uff09\u89d2\u5ea6\u8bc1\u660e\u4e86Mn\u63ba\u6742\u8fdb\u5165\u4e86LFP\u7684\u6676\u4f53\u7ed3\u6784\u4e14\u4ece\u8868\u9762\u5230\u5185\u90e8\u4f53\u73b0\u51fa\u68af\u5ea6\u63ba\u6742\u7684\u7279\u6027\u3002<\/p>\n

\"\"<\/p>\n

Figure 7(a) – (b) <\/strong>High resolution XPS spectra of P 2p, Fe 2p for pristine LFP, (c)<\/strong> and Mn 2p for manganese acetate (Mn(CH3<\/sub>COO)2<\/sub>) in the precursor. (d) – (e)<\/strong> High resolution XPS spectra of P 2p, Fe 2p for pristine Mn-LFP, (c) <\/strong>Mn 2p for the doped Mn in the Mn-LFP surface, (g)<\/strong> and Mn 2p for the doped Mn in the Mn-LFP surface with different depth of 0, 1, 2, 3, 5, 8 and 10 nm.<\/p>\n

Fig.8<\/strong>\u7ed3\u5408FIB\u53caEDS\u7ebf\u626b\uff0c\u8bc1\u660e\u4e86Mn\u5728LFP\u8868\u9762\u7684\u63ba\u6742\u6df1\u5ea6\u4e3a10-15nm\u3002<\/p>\n

\"\"<\/p>\n

Figure 8(a) <\/strong>SEM image of the pristine Mn-LFP. (b)<\/strong> SEM image of the cross-section of the pristine Mn-LFP cut by the Focused Ion Beam (FIB). (c)<\/strong> and (d)<\/strong> EDS line scanning of the Fe and Mn.\u00a0<\/p>\n

Fig.9<\/strong>\u8868\u660eMn\u63ba\u6742LFP\/C\u4e5f\u80fd\u591f\u8fdb\u4e00\u6b65\u63d0\u5347\u5176\u5faa\u73af\u7a33\u5b9a\u6027\u53ca\u500d\u7387\u6027\u80fd\uff0c\u4f46\u662f\u5176\u63d0\u5347\u6548\u679c\u4e0d\u5982PPy\u539f\u4f4d\u5305\u8986\uff08\u4e0eFig.2\u6bd4\u8f83\uff09\u3002<\/p>\n

\"\"<\/p>\n

Figure 9(a)<\/strong> Cycling performance of the LFP and Mn-LFP cycled at 1C, after 3 formation cycles at C\/10. (b) <\/strong>– (c) <\/strong>Galvanostatic charge-discharge curves of the pristine LFP and Mn-LFP, tested for 500 cycles at 1C (170 mAh g-1<\/sup>) between 2.5 and 4.2 V vs. Li\/Li+<\/sup>. (d) <\/strong>Master plot showing the rate capability difference in the pristine LFP vs. Mn-LFP. (e) – (f)<\/strong> Nyquist plots of the LFP (e) <\/strong>and Mn-LFP (f)<\/strong> after the 1st<\/sup>, 50th<\/sup>, 100th<\/sup>, 200th<\/sup>, 300th<\/sup>, 400th<\/sup> and 500th<\/sup> cycle at 1C rate, respectively. The impedance spectra were collected at the charged state of 4.0 V.<\/p>\n

\u3010\u5c0f\u7ed3\u3011<\/strong><\/p>\n

\u4e0a\u8ff0\u5de5\u4f5c\u9996\u6b21\u4ece\u539f\u5b50\u5c3a\u5bf8\u63ed\u793a\u4e86LFP\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u7684\u673a\u7406\u662f\u7531\u4e8e\u8868\u9762\u975e\u6676\u5316\uff0c\u51fa\u73b0\u975e\u6d3b\u6027\u3001\u4e0d\u53ef\u9006\u3001\u65e0\u5b9a\u578b\u6001 FePO4<\/sub>\u3002\u975e\u6d3b\u6027\u3001\u4e0d\u53ef\u9006\u3001\u65e0\u5b9a\u578b\u6001 FePO4<\/sub>\u7684\u51fa\u73b0\u4f1a\u5bfc\u81f4LFP\u5bb9\u91cf\u53ca\u7535\u538b\u8870\u9000\uff0c\u800c\u4e14\u968f\u7740\u5faa\u73af\u6b21\u6570\u7684\u589e\u52a0\uff0c\u8fd9\u4e00\u73b0\u8c61\u4f1a\u9010\u6e10\u52a0\u5267\u3002PPy \u539f\u4f4d\u5305\u8986LFP\u540e\uff0c\u80fd\u591f\u4e0e\u539f\u6709\u7684\u78b3\u5305\u8986\u5c42\u4e00\u9053\u5f62\u6210\u66f4\u52a0\u81f4\u5bc6\u7684\u4fdd\u62a4\u5c42\uff0c\u80fd\u591f\u6709\u6548\u9694\u5f00 LFP\u4e0e\u7535\u89e3\u6db2\u7684\u76f4\u63a5\u63a5\u89e6\uff0c\u4ece\u800c\u8d77\u5230\u6709\u6548\u6291\u5236LFP\u5728\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u7684\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u3002\u6b64\u5916\uff0c\u591a\u79cd\u8868\u5f81\u624b\u6bb5\u7ed3\u5408\u8bc1\u5b9e\u4e86Mn\u80fd\u591f\u90e8\u5206\u5360\u636eFe\u7684\u4f4d\u7f6e\uff0c\u5f62\u6210\u4ece\u5916\u5230\u5185Mn\u542b\u91cf\u9010\u6e10\u964d\u4f4e\u768410-15nm\u6df1\u5ea6\u68af\u5ea6\u63ba\u6742\u5c42—LiMnx<\/sub>Fe1-x<\/sub>PO4<\/sub>\uff08LMFP\uff09\uff0c\u8be5\u63ba\u6742\u5c42\u5177\u6709\u66f4\u9ad8\u7684\u70ed\u7a33\u5b9a\u6027\uff0c\u8010\u53d7\u7535\u89e3\u6db2\u4fb5\u8680\uff0c\u56e0\u6b64\u4e5f\u80fd\u6709\u6548\u8d77\u5230\u6291\u5236LFP\u7535\u5316\u5b66\u5faa\u73af\u8fc7\u7a0b\u4e2d\u5bb9\u91cf\/\u7535\u538b\u8870\u9000\u7684\u4f5c\u7528\u3002\u4e0a\u8ff0\u5de5\u4f5c\u4ee5\u201c<\/strong>First Atomic – Scale Insight on Degradation in Lithium Iron Phosphate Cathodes by Transmission Electron Microscopy<\/strong>\u201d<\/strong>\u4e3a\u9898\uff0c\u5728\u7ebf\u53d1\u8868\u5728<\/strong>Journal of Physical Chemistry Letters<\/strong>\uff08<\/strong>DOI: 10.1021\/acs.jpclett.0c00317<\/strong>\uff09<\/strong>\uff1b\u4ee5\u201cAtomic Scale Insight on the Fundamental Mechanism of Mn Doped LiFePO4<\/sub>\u201d<\/strong>\u4e3a\u9898\uff0c\u5728\u7ebf\u53d1\u8868\u5728<\/strong>Sustainable Energy & Fuels<\/strong>\uff08<\/strong>DOI: 10.1039\/D0SE00312C<\/strong>\uff09<\/strong>\u3002\u4e0a\u8ff0\u5de5\u4f5c\u7684\u5b9e\u9a8c\u90e8\u5206\u4e3b\u8981\u7531\u7855\u58eb\u7814\u7a76\u751f\u848b\u98de\u5f00\u5c55\u3002\u4e0a\u8ff0\u5de5\u4f5c\u7684DFT\u8ba1\u7b97\u90e8\u5206\u4e3b\u8981\u7531\u5317\u4eac\u79d1\u6280\u5927\u5b66\u53ca\u5317\u4eac\u8ba1\u7b97\u79d1\u5b66\u7814\u7a76\u4e2d\u5fc3\u7684\u9648\u660e\u9633\u7814\u7a76\u5458\u5b8c\u6210\u3002\u8be5\u5de5\u4f5c\u83b7\u5f97\u4e86\u56db\u5ddd\u7701\u6770\u51fa\u9752\u5e74\u57fa\u91d1\uff082017JQ0044\uff09\u53ca\u6210\u90fd\u5e02\u56fd\u9645\u79d1\u6280\u5408\u4f5c\u91cd\u70b9\u9879\u76ee\uff082019-GH02-00052-HZ\uff09\u7684\u8d44\u52a9\u3002<\/p>\n

\u3010\u6587\u7ae0\u94fe\u63a5\u3011<\/strong><\/p>\n

https:\/\/pubs.acs.org\/action\/doSearch?AllField=First+Atomic+-+Scale+Insight+on+Degradation+in+Lithium+Iron+Phosphate+Cathodes+by+Transmission+Electron+Microscopy&SeriesKey=jpclcd<\/a><\/p>\n

https:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2020\/se\/d0se00312c#!divAbstract<\/p>\n","protected":false},"excerpt":{"rendered":"

\u3010\u5f15\u8a00\u3011 \u6a44\u6984\u77f3\u578b LiFePO4\uff08LFP\uff09\u5177\u6709\u6210\u672c\u4f4e\u3001\u70ed\u7a33\u5b9a\u6027\u9ad8\u3001\u5faa\u73af\u7a33\u5b9a\u6027\u597d\u7b49\u4f18\u70b9\uff0c\u88ab\u8ba4\u4e3a\u662f\u4e00\u79cd\u5f88\u6709\u5e94\u7528\u524d\u666f\u7684\u9502\u79bb\u5b50\u7535\u6c60\u6b63\u6781\u6750\u6599\u3002\u7136\u800c LFP \u7684\u7535\u5b50\u5bfc\u7535\u6027…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[215],"tags":[],"class_list":["post-203344","post","type-post","status-publish","format-standard","hentry","category-jiedu"],"_links":{"self":[{"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/posts\/203344"}],"collection":[{"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"\/\/m.iemloyee.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=203344"}],"version-history":[{"count":3,"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/posts\/203344\/revisions"}],"predecessor-version":[{"id":203356,"href":"\/\/m.iemloyee.com\/index.php?rest_route=\/wp\/v2\/posts\/203344\/revisions\/203356"}],"wp:attachment":[{"href":"\/\/m.iemloyee.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=203344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/m.iemloyee.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=203344"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/m.iemloyee.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=203344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}