{"id":242993,"date":"2022-10-06T06:59:43","date_gmt":"2022-10-05T22:59:43","guid":{"rendered":"\/\/m.iemloyee.com\/?p=242993"},"modified":"2022-10-05T20:01:00","modified_gmt":"2022-10-05T12:01:00","slug":"%e6%b1%9f%e6%b1%89%e5%a4%a7%e5%ad%a6%e6%a2%81%e6%b5%8e%e5%85%83nano-energy%e4%b8%80%e7%9f%b3%e4%ba%8c%e9%b8%9f%e7%ad%96%e7%95%a5%e5%8e%9f%e4%bd%8d%e6%9e%84%e7%ad%91%e5%a4%9a","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=242993","title":{"rendered":"\u6c5f\u6c49\u5927\u5b66\u6881\u6d4e\u5143Nano Energy:\u201c\u4e00\u77f3\u4e8c\u9e1f\u201d\u7b56\u7565\u539f\u4f4d\u6784\u7b51\u591a\u5b54FeF3@C\u590d\u5408\u65e0\u9502\u6b63\u6781\u6750\u6599\u7528\u4e8e\u9ad8\u6027\u80fd\u9502\u79bb\u5b50\u7535\u6c60"},"content":{"rendered":"

\u3010\u7814\u7a76\u80cc\u666f\u3011<\/b><\/strong><\/p>\n

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\u3010\u5de5\u4f5c\u4ecb\u7ecd\u3011<\/b><\/strong><\/p>\n

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\u3010\u5185\u5bb9\u8868\u8ff0\u3011<\/b><\/strong><\/p>\n

\u9996\u5148\uff0c\u524d\u9a71\u4f53(SiO2<\/sub>\u3001\u8461\u8404\u7cd6\u3001\u785d\u9178\u94c1)\u901a\u8fc7\u673a\u68b0\u7403\u78e8\u5747\u5300\u6df7\u5408\uff1b\u5176\u6b21\uff0c\u6df7\u5408\u7269\u5728800\u2103\u6c29\u6c14(Ar)\u6c14\u6c1b\u4e2d\u70ed\u5904\u74062\u5c0f\u65f6\uff0c\u751f\u6210\u4e86\u94c1\u78b3\u5316\u5408\u7269\u5e76\u4e14\u5b8c\u6210\u4e86\u8461\u8404\u7cd6\u7684\u78b3\u5316\u3002\u540c\u65f6\uff0cSiO2<\/sub>\u6a21\u677f\u5242\u5747\u5300\u5d4c\u5165\u78b3\u57fa\u4f53\u4e2d\uff1b\u6700\u540e\uff0c\u5c06\u590d\u5408\u6750\u6599\u4e2d\u95f4\u4f53\u4e0ePTFE\u8fdb\u884c\u6df7\u5408\uff0c\u5728Ar\u6c1b\u56f4\u4e0b\u5347\u6e29\u81f3600\u2103\u65f6PTFE\u5206\u89e3\u6210CF4<\/sub>\uff0c\u5176\u53ef\u4ee5\u539f\u4f4d\u8680\u523bSiO2<\/sub>\u548c\u5e76\u751f\u6210\u6c1f\u5316\u94c1\uff0c\u4ece\u800c\u5f97\u5230p-FeF3<\/sub>@C\u590d\u5408\u6750\u6599\u3002\u8be5\u65b9\u6cd5\u907f\u514d\u4f20\u7edf\u6db2\u76f8\u6c1f\u5316\u53ca\u523b\u8680\u9020\u6210\u7684\u6c61\u6c34\u5904\u7406\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u5728\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\uff0cPTFE\u65e2\u662f\u523b\u8680\u5242\u4e5f\u662f\u6c1f\u5316\u5242\uff0c\u6545\u5176\u53cc\u91cd\u4f5c\u7528\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u79cd\u201c\u4e00\u77f3\u4e24\u9e1f\u201d\u7684\u7b56\u7565\u3002<\/p>\n

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Scheme 1.<\/strong>\u00a0The schematic illustration of the preparation\u00a0of p-FeF3<\/sub>@C nanocomposite.<\/p>\n

\u901a\u8fc7XRD\u548cXPS\u8868\u5f81\u4e86FeF3<\/sub>\u7684\u6210\u529f\u751f\u6210\uff0c\u6b64\u5916\uff0c\u901a\u8fc7SEM\u548cTEM\u4ece\u5fae\u89c2\u89d2\u5ea6\u89c2\u5bdf\u5230\u4e30\u5bcc\u4e14\u7684\u591a\u5b54\u7ed3\u6784\u3002\u901a\u8fc7BET\u6d4b\u5b9a\u4e86\u590d\u5408\u6750\u6599\u7684\u5b54\u9699\u5ea6\uff0c\u5e76\u8bc1\u660e\u4e86SiO2<\/sub>\u7684\u5f15\u5165\u6210\u529f\u6784\u9020\u4e86p-FeF3<\/sub>@C\u4e2d\u8f83\u591a\u7684\u4ecb\u5b54\u7ed3\u6784\u3002p-FeF3<\/sub>@C\u4e2d\u78b3\u57fa\u8d28\u7684\u5f15\u5165\u548c\u4e30\u5bcc\u7684\u7eb3\u7c73\u5b54\u9699\u975e\u5e38\u6709\u5229\u4e8e\u5bfc\u7535\u6027\u548cLi+<\/sup>\u6269\u6563\u901f\u7387\u7684\u63d0\u9ad8\uff0c\u5e76\u7f13\u89e3\u4e86FeF3<\/sub>\u5728\u91cd\u590d\u7684\u9502\u5316\/\u8131\u9502\u8fc7\u7a0b\u4e2d\u7684\u4f53\u79ef\u53d8\u5316\u3002<\/p>\n

Fig<\/strong>.<\/strong>\u00a01.<\/strong>\u00a0Typical characterizations of p-FeF3<\/sub>@C material. (a) XRD Rietveld refinements. HRXPS spectra of (b) Fe 2p<\/i><\/em>\u00a0and (c) F 1s<\/i><\/em>. (d-e) SEM images. (f) TEM images. (g) STEM HAADF image with its corresponding EDX elemental\u00a0mapping images. (h) HRTEM images. (i) SAED images. (j-k) N2<\/sub>\u00a0adsorption\/desorption isotherms and the pore size distribution plots, respectively.<\/p>\n

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\u4e3a\u4e86\u8fdb\u4e00\u6b65\u8bc1\u660ep-FeF3<\/sub>@C\u7684\u4f18\u5f02\u7684\u7535\u5316\u5b66\u6027\u80fd\uff0c\u4f7f\u7528\u5546\u4e1aFeF3<\/sub>\u4f5c\u4e3a\u5bf9\u7167\u7ec4\u5728\u5145\u653e\u7535\u7535\u538b\u8303\u56f4\uff082.0-4.5 V\uff09\u7684\u533a\u95f4\u5185\u5bf9\u5176\u8fdb\u884c\u4e86\u7814\u7a76\u3002p-FeF3<\/sub>@C\u5728\u4e0d\u540c\u7535\u6d41\u5927\u5c0f\u6761\u4ef6\u4e0b\u8868\u73b0\u51fa\u6bd4\u5546\u4e1aFeF3<\/sub>\u66f4\u597d\u7684\u500d\u7387\u6027\u80fd\u3002\u57285C\u6761\u4ef6\u4e0b\u83b7\u5f97\u4e86189.2 mAh g-1<\/sup>\u7684\u53ef\u9006\u5faa\u73af\u5bb9\u91cf\u3002\u957f\u5faa\u73af\u6027\u80fd\u4e5f\u5341\u5206\u4f18\u5f02\uff0cp-FeF3<\/sub>@C\u6b63\u6781\u5728\u7b2c100\u5708\u548c200\u5708\u5206\u522b\u8868\u73b0\u51fa\u4e8695%\u548c92.5%\u7684\u5bb9\u91cf\u4fdd\u6301\u7387\uff0c\u5e93\u4f26\u6548\u7387\u63a5\u8fd1100%\u3002<\/p>\n

Fig.<\/strong>\u00a0<\/strong>2<\/strong>\u00a0Electrochemical characterizations of the p-FeF3<\/sub>@C electrode. (a) The initial three CV curves at a scan rate of 0.2 mV s-1<\/sup>\u00a0between 2.0 V to 4.5 V. (b) The first three-cycle galvanostatic discharge\/charge\u00a0profiles. (c) Rate performance. (d) Galvanostatic discharge\/charge profiles at various current rates from 0.1 to 5 C. (e) Cycling performance and the corresponding Coulombic efficiency.<\/p>\n

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Fig. 3<\/strong>\u00a0Li+<\/sup>\u00a0storage mechanism and electrochemical kinetic studies of the Li-free p-FeF3<\/sub>@C cathode.\u00a0(a) CV curves of p-FeF3<\/sub>@C at various scan rates.\u00a0(b) The fitted b value determined from the peak current and sweep rate. (c)\u00a0Schematic diagram of the capacitive contribution of the p-FeF3<\/sub>@C electrode at 1.0 mV s-1<\/sup>. (d) Capacity contribution ratio at various scan rates. (e) Nyquist plots of the p-FeF3<\/sub>@C cathode\u00a0and commercial FeF3<\/sub>\u00a0cathode. (f) GITT\u00a0curves of p-FeF3<\/sub>@C and commercial FeF3<\/sub>.\u00a0(g)\u00a0GITT zoomed-in view of p-FeF3@C cathode and commercial FeF3 cathode.\u00a0(h)The calculated Li+<\/sup>\u00a0diffusion coefficient of the p-FeF3<\/sub>@C cathode and commercial FeF3<\/sub>\u00a0cathode.<\/p>\n

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DFT\u7ed3\u679c\u8868\u660ep-FeF3<\/sub>@C\u590d\u5408\u6750\u6599\u7684\u5e26\u9699\u51cf\u5c0f\uff0c\u5bfc\u81f4\u5bfc\u5e26\u5411\u8d39\u7c73\u80fd\u7ea7\u504f\u79fb\u3002\u901a\u8fc7\u7406\u8bba\u8ba1\u7b97\u8fd8\u53d1\u73b0\u4e86F\u63ba\u6742\u7684\u78b3\u5bf9\u590d\u5408\u6750\u6599\u7684\u5bfc\u7535\u6027\u5177\u6709\u4e00\u5b9a\u7684\u8d21\u732e\u4f5c\u7528\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5f97\u51fa\u7ed3\u8bba\uff0cp-FeF3<\/sub>@C\u53ef\u4ee5\u5927\u5927\u6539\u5584\u91d1\u5c5e\u6c1f\u5316\u7269\u7535\u5b50\u7535\u5bfc\u7387\u4f4e\u7684\u7f3a\u70b9\u5e76\u4e14\u6709\u6548\u5730\u4fc3\u8fdbLi+<\/sup>\u7684\u4f20\u8f93\u3002<\/p>\n

Fig. 4<\/b><\/strong>\u00a0Computational studies of the electrical conductivities of the obtained samples. The structural model of (a) bulk FeF3<\/sub>, (b) the fluorinated C species (CFx<\/sub>) and (c) the p-FeF3<\/sub>@C composite material. (d) The PDOS of bulk FeF3<\/sub>, CFx<\/sub>\u00a0and p-FeF3<\/sub>@C composite material. (e) The charge density difference at the\u00a0interface from the p-FeF3<\/sub>@C composite material.<\/p>\n

\"\"<\/p>\n

\u901a\u8fc7\u5bf9\u5faa\u73af\u540e\u7684\u7535\u6781\u8fdb\u884c\u4e0d\u540c\u523b\u8680\u6df1\u5ea6\u7684XPS\u5206\u6790\uff0c\u7ed3\u679c\u8868\u660ep-FeF3<\/sub>@C\u6b63\u6781\u548c\u5546\u4e1aFeF3<\/sub>\u6b63\u6781\u90fd\u5177\u6709\u5185\u5c42\u4e3a\u65e0\u673a\u5c42\uff0c\u5916\u5c42\u4e3a\u6709\u673a\u5c42\u7684CEI\u7ed3\u6784\u3002\u5176\u4e2dp-FeF3<\/sub>@C\u6b63\u6781\u7684CEI\u6709\u673a\u5c42\u539a\u5ea6\u6bd4\u5546\u4e1aFeF3<\/sub>\u6b63\u6781\u66f4\u8584\uff0c\u800c\u5360\u65e0\u673a\u5c42\u4e3b\u8981\u6210\u5206\u7684Li2<\/sub>CO3<\/sub>\u548cLiF\u7684\u542b\u91cf\u66f4\u9ad8\uff0c\u8fd9\u6709\u52a9\u4e8e\u63a7\u5236Li+<\/sup>\u7684\u5747\u5300\u4f20\u8f93\uff0c\u9632\u6b62\u4e86\u7535\u89e3\u6db2\u7684\u6301\u7eed\u5206\u89e3\uff0c\u6784\u7b51\u66f4\u52a0\u5747\u5300\u4e14\u81f4\u5bc6\u7684CEI\u819c\u3002<\/p>\n

Fig. 5<\/strong>\u00a0HRXPS depth profiling of the 0.1-C 100-cycled p-FeF3<\/sub>@C and FeF3<\/sub>\u00a0electrodes CEI: (a, e) C 1s<\/i><\/em>, (b, f) O 1s<\/i><\/em>, (c, g) Li 1s<\/i><\/em>\u00a0and (d, h) F 1s<\/i><\/em>.<\/p>\n

\"\"<\/p>\n

\u4e3a\u8fdb\u4e00\u6b65\u8bc1\u5b9e\u4e0a\u8ff0\u89c2\u70b9\uff0c\u5bf9CEI\u4e3b\u8981\u6210\u5206\u7684\u542b\u91cf\u8fdb\u884c\u4e86\u8be6\u7ec6\u7684\u7edf\u8ba1\u5206\u6790\uff0c\u7ed3\u679c\u548c\u4e0a\u8ff0\u5206\u6790\u76f8\u543b\u5408\u3002\u5e76\u901a\u8fc7TEM\u89c2\u5bdf\u5230p-FeF3<\/sub>@C\u6b63\u6781\u7684CEI\u539a\u5ea6\u6bd4\u5546\u4e1aFeF3<\/sub>\u6b63\u6781\u66f4\u8584\u66f4\u5747\u5300\u3002\u5e76\u901a\u8fc7CEI\u622a\u9762\u7684\u793a\u610f\u56fe\u5bf9p-FeF3<\/sub>@C\u6b63\u6781\u548c\u5546\u4e1aFeF3<\/sub>\u6b63\u6781\u7684CEI\u6210\u5206\u53ca\u542b\u91cf\u8fdb\u884c\u4e86\u5206\u6790\u3002\u8bc1\u660e\u4e86p-FeF3<\/sub>@C\u6b63\u6781\u5177\u6709\u5747\u5300\u3001\u81f4\u5bc6\u4e14\u8584\u7684CEI\u819c\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u8f83\u957f\u7684\u5faa\u73af\u7a33\u5b9a\u6027\u3002\u800c\u5546\u4e1aFeF3<\/sub>\u6b63\u6781\u4e0a\u7684CEI\u5f88\u5bb9\u6613\u7834\u88c2\uff0c\u56e0\u4e3a\u5b83\u65e0\u6cd5\u627f\u53d7\u5728\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u7531\u4e8e\u4f53\u79ef\u53d8\u5316\u800c\u4ea7\u751f\u7684\u673a\u68b0\u5e94\u529b\u3002\u56e0\u6b64\uff0c\u7834\u88c2\u7684CEI\u4f1a\u5f15\u53d1\u7535\u89e3\u6db2\u7684\u6301\u7eed\u5206\u89e3\uff0c\u4ea7\u751f\u66f4\u591a\u7684\u526f\u4ea7\u7269\uff0c\u5bfc\u81f4\u5faa\u73af\u6027\u80fd\u8f83\u5dee\u3002<\/p>\n

Fig. 6<\/strong>\u00a0CEI composition\u00a0concentration of\u00a0the\u00a0(a-d)\u00a0p-FeF3<\/sub>@C and (e-h) commercial FeF3<\/sub>\u00a0electrodes. TEM images of the cycled (i) p-FeF3<\/sub>@C electrode and (j) commercial FeF3<\/sub>\u00a0electrode. Schematic illustration of the CEI structure formed on (k) p-FeF3<\/sub>@C electrode and (l) commercial FeF3<\/sub>\u00a0electrode.<\/p>\n

\"\"<\/p>\n

\u4e3a\u4e86\u8fdb\u4e00\u6b65\u8bc4\u4f30p-FeF3<\/sub>@C\u7535\u6781\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u53ef\u884c\u6027\uff0c\u901a\u8fc7\u5168\u7535\u6c60\u6d4b\u8bd5\u63a2\u7d22\u4e86\u5176\u7535\u5316\u5b66\u6027\u80fd\u3002\u9502\u5316\u77f3\u58a8\uff08PLG\uff09||p-FeF3<\/sub>@C\u5168\u7535\u6c60\u5728\u6db2\u6001\u7535\u89e3\u8d28\u4e2d\u663e\u793a\u51fa\u826f\u597d\u7684\u500d\u7387\u6027\u80fd\u548c\u5faa\u73af\u7a33\u5b9a\u6027\uff0c\u5e76\u4e14\u5728\u56fa\u6001\u7535\u6c60\u4e2d\u7ecf\u8fc7150\u6b21\u5faa\u73af\u540e\u663e\u793a\u51fa94.7%\u7684\u9ad8\u5bb9\u91cf\u4fdd\u6301\u7387\u548c97.8%\u7684\u5e73\u5747\u5e93\u4ed1\u6548\u7387\u3002<\/p>\n

Fig. 7<\/strong>\u00a0Studies of the assembled PLG||p-FeF3<\/sub>@C full-cells. (a)\u00a0Schematic illustration\u00a0of the full-cell composed of p-FeF3<\/sub>@C cathode and pre-lithiated graphite anode. (b) Typical galvanostatic discharge\/charge curves for p-FeF3<\/sub>@C\u00a0half-cell, PLG\u00a0half-cell\u00a0and PLG||p-FeF3<\/sub>@C. (c) Rate performance. (d and e) Long-term cyclic performance at 0.2 C and its corresponding galvanostatic discharge\/charge profiles of some selected cycles.<\/p>\n

\"\"<\/p>\n

\u3010\u603b\u7ed3\u3011<\/b><\/strong><\/p>\n

\u5728\u8fd9\u9879\u5de5\u4f5c\u4e2d\uff0c\u901a\u8fc7\u4e00\u6b65\u6c1f\u5316\u5e76\u523b\u8680\u7684\u65b9\u6cd5\uff0c\u5f00\u53d1\u4e86\u5177\u6709\u4e30\u5bcc\u5b54\u9699\u7ed3\u6784\u7684p-FeF3<\/sub>@C\u590d\u5408\u65e0\u9502\u6b63\u6781\u6750\u6599\uff0c\u7528\u4e8e\u9ad8\u6bd4\u80fd\u91cf\u548c\u957f\u5faa\u73af\u5bff\u547d\u7684\u9502\u79bb\u5b50\u7535\u6c60\u6b63\u6781\u3002\u901a\u8fc7\u57fa\u672c\u7684\u7269\u7406\u5316\u5b66\u6027\u8d28\u7684\u8868\u5f81\u624b\u6bb5\u8bc1\u660e\u4e86\u591a\u5b54\u7ed3\u6784\u548c\u6d3b\u6027\u7269\u8d28\u7684\u751f\u6210\uff0c\u7ec4\u88c5\u7684\u9502\u534a\u7535\u6c60\u5c55\u73b0\u51fa\u4e86\u5341\u5206\u4f18\u5f02\u7684\u7535\u5316\u5b66\u6027\u80fd\uff0c\u5f97\u76ca\u4e8e\u5176\u5177\u6709\u826f\u597d\u5bfc\u7535\u6027\u7684\u591a\u5b54C\u7ed3\u6784\uff0cp-FeF3<\/sub>@C\u590d\u5408\u6b63\u6781\u6750\u6599\u53ef\u63d0\u4f9b208.6 mAh g-1<\/sup>\u7684\u9ad8\u53ef\u9006\u6bd4\u5bb9\u91cf\u5e76\u4e14\u57281\u00a0C\u6761\u4ef6\u4e0b\u5faa\u73af200\u5708\u540e\u5177\u6709\u8f83\u597d\u7684\u5bb9\u91cf\u4fdd\u6301\u7387\uff0892.5%\uff09\u3002\u901a\u8fc7\u5bb9\u91cf\u5206\u6790\u548cGITT\u6d4b\u8bd5\u8bc1\u660e\u4e86\u8be5\u590d\u5408\u6750\u6599\u5177\u6709\u4f18\u5f02\u7684\u7535\u5bb9\u8d21\u732e\u548cLi+<\/sup>\u6269\u6563\u901f\u7387\uff0c\u8fd9\u4e9b\u90fd\u5f52\u56e0\u4e8e\u591a\u5b54\u7ed3\u6784\u8f83\u5927\u7684\u63a5\u89e6\u9762\u79ef\u548c\u4e30\u5bcc\u7684Li+<\/sup>\u4f20\u8f93\u901a\u9053\u3002DFT\u7ed3\u679c\u8868\u660ep-FeF3<\/sub>@C\u590d\u5408\u6750\u6599\u7684\u5e26\u9699\u66f4\u5c0f\u3002\u901a\u8fc7\u5bf9\u5faa\u73af\u540e\u7684\u7535\u6781\u8fdb\u884c\u5206\u6790\uff0c\u53d1\u73b0p-FeF3<\/sub>@C\u590d\u5408\u7535\u6781\u8868\u9762\u751f\u6210\u4e86\u5bcc\u542bLi2<\/sub>CO3<\/sub>\u548cLiF\u7684\u5747\u5300\u4e14\u81f4\u5bc6\u7684CEI\u819c\uff0c\u53ef\u4ee5\u4e3a\u7535\u6781\u8868\u9762\u63d0\u4f9b\u8fde\u7eed\u7684\u754c\u9762\u4fdd\u62a4\u3002\u4e3a\u4e86\u8fdb\u4e00\u6b65\u8bc1\u660e\u591a\u5b54\u6b63\u6781\u6750\u6599\u7684\u5b9e\u7528\u6027\uff0cp-FeF3<\/sub>@C\u4e0e\u9502\u5316\u77f3\u58a8\uff08PLG\uff09\u7ec4\u5408\u7684\u5168\u7535\u6c60\u4e2d\u5c55\u793a\u51fa\u4e86\u4f18\u5f02\u7684\u7535\u5316\u5b66\u7684\u6027\u80fd\u3002\u6b64\u5916\uff0c\u6240\u63d0\u51fa\u7684\u5408\u6210\u7b56\u7565\u5177\u6709\u5e7f\u6cdb\u7684\u666e\u9002\u6027\u3002\u56e0\u6b64\uff0c\u8fd9\u9879\u5de5\u4f5c\u6210\u529f\u5730\u63ed\u793a\u4e86\u539f\u4f4d\u8680\u523b\/\u6c1f\u5316\u7b56\u7565\u5408\u6210\u7eb3\u7c73\u591a\u5b54TMFs@C\u590d\u5408\u6750\u6599\u7684\u5de8\u5927\u6f5c\u529b\u3002<\/p>\n

\u8bba\u6587\u94fe\u63a5<\/strong>\uff1a<\/strong><\/p>\n

Kang Du, Runming Tao, Chi Guo, Haifeng Li, Xiaolang Liua, Pingmei Guo, Deyu Wang,\u00a0Jiyuan Liang, Jianlin Li, Sheng Dai, Xiao-Guang Sun. In-situ synthesis of porous metal fluoride@carbon composite\u00a0via simultaneous etching\/fluorination enabled superior Li\u00a0storage performance. Nano energy, 2022.\u00a0https:\/\/doi.org\/10.1016\/j.nanoen.2022.107862<\/p>\n","protected":false},"excerpt":{"rendered":"

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