{"id":1589,"date":"2024-03-18T22:39:30","date_gmt":"2024-03-18T14:39:30","guid":{"rendered":"https:\/\/www.bdmaee.cn\/?p=1589"},"modified":"2024-03-18T22:40:37","modified_gmt":"2024-03-18T14:40:37","slug":"%e9%98%bb%e7%87%83%e6%80%a7%e5%b1%80%e9%83%a8%e9%ab%98%e6%b5%93%e7%94%b5%e8%a7%a3%e6%b6%b2%e5%9c%a8%e7%a1%85%e5%9f%ba%e8%b4%9f%e6%9e%81%e4%b8%8a%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.bdmaee.cn\/archives\/1589","title":{"rendered":"\u963b\u71c3\u6027\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2\u5728\u7845\u57fa\u8d1f\u6781\u4e0a\u7684\u5e94\u7528"},"content":{"rendered":"

\u963b\u71c3\u6027\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2<\/strong><\/a>\u5728\u7845\u57fa\u8d1f\u6781\u4e0a\u7684\u5e94\u7528<\/p>\n

\u3010\u524d\u8a00\u3011<\/p>\n

\u9502\u79bb\u5b50\u7535\u6c60\u76ee\u524d\u4ecd\u53d7\u5230\u80fd\u91cf\u5bc6\u5ea6\u4e0d\u591f\u9ad8\u548c\u5b89\u5168\u6027\u80fd\u8f83\u5dee\u7b49\u95ee\u9898\u7684\u5236\u7ea6\u3002\u7845\u57fa\u8d1f\u6781\u6750\u6599\u88ab\u89c6\u4e3a\u73b0\u6709\u5546\u4e1a\u5316\u77f3\u58a8\u78b3\u8d1f\u6781\u6750\u6599\u7684\u6709\u5e0c\u671b\u7684\u66ff\u4ee3\u6027\u4ea7\u54c1\u4e4b\u4e00\u3002\u7136\u800c\u7845\u57fa\u8d1f\u6781\u6750\u6599\u5728\u5145\u653e\u7535\u8fc7\u7a0b\u4e2d\u5b58\u5728\u8f83\u5927\u7684\u4f53\u79ef\u53d8\u5316\uff0c\u4ece\u800c\u963b\u788d\u4e86\u5176\u5546\u4e1a\u5316\u8fdb\u7a0b\uff0c\u4e3a\u6b64\u7814\u7a76\u4eba\u5458\u8fdb\u884c\u4e86\u5927\u91cf\u7684\u6539\u6027\u7814\u7a76\u5e76\u53d6\u5f97\u4e86\u91cd\u5927\u8fdb\u5c55\u3002\u4f46\u662f\u5728\u5f00\u53d1\u9002\u7528\u4e8e\u7845\u57fa\u8d1f\u6781\u6750\u6599\u7684\u65b0\u578b\u7535\u89e3\u6db2\u65b9\u9762\u7684\u62a5\u9053\u76f8\u5bf9\u8f83\u5c11\u3002\u7f8e\u56fd\u897f\u5317\u592a\u5e73\u6d0b\u56fd\u5bb6\u5b9e\u9a8c\u5ba4\uff08Pacific Northwest National Laboratory\uff0c PNNL\uff09\u7684\u5f20\u7ee7\u5149 (Ji-Guang Zhang) \u535a\u58eb\u7b49\u4eba\u81ea\u53bb\u5e74\u4ee5\u6765\u62a5\u9053\u4e86\u4e00\u7cfb\u5217\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2(Localized High-Concentration Electrolytes, LHCEs)\u53ef\u4ee5\u6709\u6548\u5730\u5bf9\u9502\u91d1\u5c5e\u8868\u9762\u8fdb\u884c\u4fdd\u62a4\u3002\u8003\u8651\u5230\u7845\u57fa\u8d1f\u6781\u548c\u9502\u91d1\u5c5e\u8d1f\u6781\u4fdd\u62a4\u7684\u5171\u901a\u6027\uff0c\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2\u4e5f\u88ab\u7528\u4e8e\u6539\u5584\u7845\u57fa\u8d1f\u6781\u6750\u6599\u4e0e\u7535\u89e3\u6db2\u7684\u754c\u9762\u7ed3\u6784\u95ee\u9898\u3002<\/p>\n

<\/p>\n

\u8fd1\uff0cPNNL\u7684\u8bb8\u6b66 (Wu Xu) \u535a\u58eb\uff0c\u5f20\u7ee7\u5149 (Ji-GuangZhang) \u535a\u58eb\u548c\u8d3e\u6d77\u5e73 (Haiping Jia) \u535a\u58eb\u7b49\u4eba\u5bf9\u8bfe\u9898\u7ec4\u4e4b\u524d\u62a5\u9053\u7684\u5177\u6709\u963b\u71c3\u6548\u5e94\u7684\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2(1.2 M LiFSI\/TEP-BTFE\uff0c \u5728\u672c\u6587\u4e2d\u547d\u540d\u4e3aNFE-1)\u8fdb\u884c\u4e86\u6539\u6027\uff0c\u7528\u6c1f\u4ee3\u78b3\u9178\u4e59\u70ef\u916f(FEC)\u53d6\u4ee3\u5f88\u5c0f\u4e00\u90e8\u5206\u963b\u71c3\u5242\u4e09\u4e59\u57fa\u78f7\u9178\u916f\uff08TEP\uff09\u5f97\u5230\u9002\u7528\u4e8e\u7845\u78b3\uff08Si\/Gr\uff09\u8d1f\u6781\u7684\u65b0\u578b\u7535\u89e3\u6db2(1.2M LiFSI\/(TEP-FEC)-BTFE, \u672c\u6587\u4e2d\u547d\u540d\u4e3aNFE-2), \u5176\u4e2dFEC\u7684\u7528\u91cf\u4ec5\u53601.2 wt%\u3002\u5f53\u5176\u7528\u4e8eLi||Si\/Gr\u534a\u7535\u6c60\u548cSi\/Gr||NMC\u5168\u7535\u6c60\u65f6\uff0c\u90fd\u8868\u73b0\u51fa\u4f18\u5f02\u7684\u5faa\u73af\u7a33\u5b9a\u6027\u3002\u4f5c\u8005\u4e5f\u901a\u8fc7\u673a\u7406\u5206\u6790\u53d1\u73b0\uff0c\u7528\u5f88\u5c0f\u4e00\u90e8\u5206FEC\u4ee3\u66ffTEP\u6ca1\u6709\u5f71\u54cd\u5230LiFSI\u548cTEP\u53caFEC\u4e4b\u95f4\u7684\u6eb6\u5242\u5316\u7ed3\u6784\uff0c\u751f\u6210\u7684SEI\uff08solid electrolyte interface\uff09\u548cCEI\uff08cathode electrolyte interface\uff09\u819c\u90fd\u80fd\u6709\u6548\u5730\u4fdd\u62a4\u5bf9\u5e94\u7684\u8d1f\u6781\u548c\u6b63\u6781\u8868\u9762\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u6574\u4e2a\u7535\u89e3\u6db2\u5bf9\u7535\u6c60\u7684\u7535\u5316\u5b66\u7a33\u5b9a\u6027\u3002\u8be5\u8bba\u6587\u4ee5\u201cHigh Performance Silicon Anodes Enabled by Nonflammable Localiyed High Concentration Electrolytes\u201c\u4e3a\u9898\uff0c\u53d1\u8868\u5728\u8fd1\u7684\u56fd\u9645\u8457\u540d\u671f\u520a\u201cAdvanced Energy Materials\u201c\u4e0a\u3002<\/p>\n

<\/p>\n

\u3010\u5185\u5bb9\u4ecb\u7ecd\u3011<\/p>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u4f5c\u8005\u9996\u6b21\u5c06\u963b\u71c3\u578b\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2(LHCE)\u5e94\u7528\u4e8e\u7845\u78b3\u8d1f\u6781(\u5546\u4e1aBTR1000)\uff0c\u901a\u8fc7\u52a0\u5165\u5fae\u91cf\u6dfb\u52a0\u5242FEC(1.2wt%)\u8fdb\u4e00\u6b65\u6539\u5584SEI\u548cCEI\u819c\u7684\u5f62\u6210\u548c\u7ec4\u6210\u3002\u5982\u56fe\u4e00\uff0c\u4f7f\u7528\u4f20\u7edf\u7535\u89e3\u6db2\u7684Li||Si\/Gr\u534a\u7535\u6c60\u7684\u5faa\u73af\u5bff\u547d\u53d6\u51b3\u4e8eFEC\u7684\u6dfb\u52a0\u91cf\uff0c\u5f53FEC\u91cf\u8fbe\u523010wt%, \u534a\u7535\u6c60\u53ef\u4ee5\u7a33\u5b9a\u5faa\u73af140\u6b21\u3002\u76f8\u6bd4\u4e4b\u4e0b, \u4f7f\u7528\u542b\u67091.2wt%FEC\u7684NFE-2\u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2\u7684 Li||Si\/Gr\u534a\u7535\u6c60\u5728 300 \u6b21\u65f6\u4fdd\u6301 73.4% \u7684\u5bb9\u91cf\u548c\u5f88\u9ad8\u7684CE \uff08>99%\uff09\u3002\u76f8\u6bd4\u4f20\u7edf\u7535\u89e3\u6db2\uff0cLHCE \u7535\u89e3\u6db2\u663e\u8457\u63d0\u9ad8\u4e86\u534a\u7535\u6c60\u7684\u5faa\u73af\u6027\u80fd\u3002\u53e6\u5916\u7535\u6781\u5728\u5d4c\u9502\u72b6\u6001\u4e0b\u7684\u81a8\u80c0\u4e5f\u5f97\u5230\u660e\u663e\u6291\u5236\u3002<\/p>\n

\u4f5c\u8005\u8fdb\u4e00\u6b65\u4ee5Si\/Gr\u4e3a\u8d1f\u6781\uff0cNMC333(\u9762\u8f7d\u91cf\u4e3a1.93mAh\/cm2)\u4e3a\u6b63\u6781\u5236\u5907\u4e86\u5168\u7535\u6c60\u3002\u56fe\u4e8c\u53ef\u89c1\uff0c\u5168\u7535\u6c60\u5728NFE-1\u548cNFE-2\u4e2d\u90fd\u8868\u73b0\u51fa\u660e\u663e\u4f18\u4e8e\u4f20\u7edf\u7535\u89e3\u6db2\u7684\u5faa\u73af\u6027\u80fd\u3002\u5176\u4e2d\u5728\u542b\u6709\u6dfb\u52a0\u5242FEC\u7684NFE-2\u4e2d\u53ef\u4ee5\u7a33\u5b9a\u5faa\u73af\u957f\u8fbe600\u5708\u3002\u53e6\u5916\u5168\u7535\u6c60\u5728NFE-2\u4e2d\u4e5f\u8868\u73b0\u51fa\u4f18\u5f02\u7684\u9ad8\u6e29\u6027\u80fd\uff0c\u540c\u65f6NFE-2\u4e5f\u80fd\u4f7f\u9ad8\u8f7d\u91cf\u6781\u7247\u7a33\u5b9a\u5faa\u73af100\u5708\u4ee5\u4e0a\u3002<\/p>\n

Si\/Gr||NMC333\u5168\u7535\u6c60\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u7684\u957f\u5faa\u73af (a) \u548c\u500d\u7387\u6027\u80fd(b), \u6d4b\u8bd5\u6e29\u5ea6\u4e3a25\u2103\u3002(c-e) \u5168\u7535\u6c60\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u5bf9\u5e94\u7684\u5145\u653e\u7535\u66f2\u7ebf\u3002(f) \u5168\u7535\u6c60Si\/Gr||NMC333\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u7684\u9ad8\u6e29\u6d4b\u8bd5\u6027\u80fd\uff0c \u6d4b\u8bd5\u6e29\u5ea6\u4e3a45\u2103\u3002(g) \u9ad8\u8f7d\u91cf\u7684\u5168\u7535\u6c60Si\/Gr||NMC333\u5728\u963b\u71c3LHCE (NFE-2)\u4e2d\u7684\u5faa\u73af\u6027\u80fd\u3002<\/p>\n

\u6838\u78c1\u5171\u632f\u6ce2\u8c31\u56fe\u548cAIMD \u6a21\u62df\u7ed3\u679c(\u56fe3)\u8868\u660e\u53cc\u6c1f\u78fa\u9170\u4e9a\u80fa\u9502\uff08LiFSI\uff09\u548c\u963b\u71c3\u5242\u4e09\u4e59\u57fa\u78f7\u9178\u916f\uff08TEP\uff09\u4ee5\u53ca\u6dfb\u52a0\u5242FEC\u7684\u7edc\u5408\u80fd\u529b\u5f88\u63a5\u8fd1\uff0c\u56e0\u6b64FEC\u90e8\u5206\u4ee3\u66ffTEP\u4e0d\u5f71\u54cdLiFSI\u548cTEP\u53caFEC\u4e4b\u95f4\u7684\u6eb6\u5242\u5316\u7ed3\u6784\u3002\u53e6\u5916\uff0c\u53cc\uff082,2,2-\u4e09\u6c1f\u4e59\u57fa\uff09\u919a\uff08BTFE\uff09\u51e0\u4e4e\u4e0d\u6eb6\u89e3\u9502\u76d0\uff0c \u56e0\u6b64LHCE\u4ecd\u7136\u4fdd\u7559\u4e86\u539f\u9ad8\u76d0\u6d53\u5ea6\u7535\u89e3\u6db2\uff08HCE\uff09(3.2 M LiFSI\/TEP)\u7684\u7279\u6027, \u4f46\u662fLHCE\u7684\u76d0\u6d53\u5ea6\u548c\u7c98\u5ea6\u53ef\u4ee5\u548c\u4f20\u7edf\u7535\u89e3\u6db2\u76f8\u6bd4\u62df\u3002<\/p>\n

(a)\u4e0d\u540c\u6eb6\u5242\u548c\u7535\u89e3\u6db2\u4e2d17O\u7684\u6838\u78c1\u5171\u632f(NMR)\u6ce2\u8c31\u56fe\u3002(b-c) \u5c40\u90e8\u9ad8\u6d53\u7535\u89e3\u6db2NFE-1\u548c NFE-2\u5728\u5206\u5b50\u52a8\u529b\u5b66(AIMD)\u6a21\u62df\u4e2d\u7684\u5feb\u7167\u3002(d)\u548c(e) \u662f\u901a\u8fc7AIMD\u6a21\u62df\u5f97\u5230\u7684\u5728NFE-1\u548cNFE-2\u4e2d\u7684Li-O(Li-OTEP, Li-OFEC,Li-OBTFE and Li-OFSi) \u7684\u5f84\u5411\u5206\u5e03\u66f2\u7ebf\u3002<\/p>\n

\u5168\u7535\u6c60\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u5faa\u73af\u540e\u8d1f\u6781\u8868\u9762SEI \u548c\u6b63\u6781\u8868\u9762CEI\u7684\u7ec4\u5206\u5206\u6790\uff08\u56fe4\u548c\u56fe5\uff09\u8fdb\u4e00\u6b65\u89e3\u91ca\u4e86LHCEs\u7684\u4f18\u8d8a\u6027\u3002\u5728NFE-2\u4e2d\u5faa\u73af\u7684\u8d1f\u6781\u8868\u9762LiF\u7684\u542b\u91cf\u9ad8\u4e8eNFE-1\u548c\u4f20\u7edf\u7535\u89e3\u6db2\u3002LiF\u53ef\u4ee5\u6709\u6548\u7f13\u89e3\u7845\u7684\u4f53\u79ef\u81a8\u80c0\u6548\u5e94\u4ece\u800c\u7a33\u5b9a\u7845\u9897\u7c92\u4ee5\u53ca\u7845\u7535\u6781\u7684\u7a33\u5b9a\u6027\u3002\u5728LHCEs\u4e2d\u5faa\u73af\u7684\u6b63\u6781\u8868\u9762\u5f62\u6210\u7684CEI\u819c\u53ef\u4ee5\u6709\u6548\u6291\u5236Ni\/Li\u6df7\u6392\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u6b63\u6781\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n

<\/p>\n

\uff08b-e\uff09\u5faa\u73af\u524dNMC333\u7535\u6781(b), \u5168\u7535\u6c60\u5728E-control (c), NFE-1(d) and NFE-2(e)\u5faa\u73af50\u5708\u540eNMC 333\u7684STEM-HAADF\u56fe\u3002(f-i)\u76f8\u5bf9\u5e94\u7684STEM-ABF\u56fe\u3002<\/p>\n

\u57fa\u4e8e\u7535\u6c60\u963b\u6297\u6570\u636e\u5f97\u5230\u7684\u677e\u5f1b\u65f6\u95f4\uff08DRT\uff09\u5206\u6790\u56fe\u8c31\uff0c \u5305\u62ec\u63a5\u89e6\u963b\u6297\u5cf0\uff0c \u4e24\u4e2aSEI\u963b\u6297\u5cf0(RSEI)\uff0c\u548c\u4e24\u4e2a\u7535\u8377\u8f6c\u79fb\u963b\u6297\u5cf0(Rct)\u3002\u534a\u7535\u6c60 Li||Si\/Gr\u548c\u5168\u7535\u6c60Si\/Gr||NMC333\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u5faa\u73af\u4e0d\u540c\u6b21\u6570\u5bf9\u5e94\u7684DRT\u56fe\u8c31\u8868\u73b0\u51fa\u9ad8\u5ea6\u7684\u4e00\u81f4\u6027\uff0c \u8bf4\u660eSi\/Gr\u8d1f\u6781\u4e00\u4fa7\u662f\u5168\u7535\u6c60\u963b\u6297\u7684\u4e3b\u8981\u6765\u6e90\u3002\u5168\u7535\u6c60\u548c\u534a\u7535\u6c60\u5728NFE-2\u4e2d\u5faa\u73af\u4e0d\u540c\u6b21\u6570\u540e\uff0cRSEI\u548cRct\u90fd\u6ca1\u6709\u660e\u663e\u53d8\u5316\uff0c\u8fdb\u4e00\u6b65\u8bf4\u660eNFE-2\u7535\u89e3\u6db2\u6709\u52a9\u4e8e\u5f62\u6210\u9ad8\u8d28\u91cf\u7684\u8d1f\u6781\u548c\u6b63\u6781\u754c\u9762\u819c\u7ed3\u6784\u3002<\/p>\n

Li||Si\/Gr\u534a\u7535\u6c60\u548c Si\/Gr||NMC333\u5168\u7535\u6c60\u5728\u4e0d\u540c\u7535\u89e3\u6db2\u4e2d\u5faa\u73af\u4e0d\u540c\u5708\u6570\u7684\u677e\u5f1b\u65f6\u95f4(DRT)\u5206\u6790. \u677e\u5f1b\u65f6\u95f4\u5206\u6790\u662f\u57fa\u4e8e\u534a\u7535\u6c60\u548c\u5168\u7535\u6c60\u7684\u963b\u6297\u6570\u636e\u3002<\/p>\n

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

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