闅忕潃鐢靛姩姹借溅甯傚満鐨勪笉鏂彂灞曪紝閿傜瀛愮數姹犱綔涓虹數鍔ㄦ苯杞︾殑涓昏鍔ㄥ姏婧愬彈鍒拌秺鏉ヨ秺澶氱殑鍏虫敞銆傚湪閿傜瀛愮數姹犱腑锛屾鏋佹潗鏂欐槸鍐冲畾鐢垫睜鎬ц兘鐨勫叧閿洜绱犱箣涓€銆侺iFePO4浣滀负涓€绉嶆柊鍨嬫鏋佹潗鏂欏叿鏈夎澶氫紭鐐癸紝濡傞珮瀹夊叏鎬с€侀珮鑳介噺瀵嗗害銆佷綆鎴愭湰绛夛紝杩戝勾鏉ュ緱鍒颁簡瓒婃潵瓒婂鐨勭爺绌躲€傜劧鑰屼负浜嗗厖鍒嗗彂鎸ュ叾浼樺娍锛岄拡瀵 LiFePO4鐨勬敼鎬х爺绌朵篃鏃ョ泭閲嶈銆侟/p>

PART 01

LiFePO4鐨勬敼鎬х爺绌迭/strong>

鏀瑰杽LiFePO4鐨勭數鍖栧鎬ц兘閫氬父閫氳繃纰冲寘瑕嗐€佺瀛愭幒鏉備互鍙婄撼绫冲寲鏉ュ疄鐜般€傚鏉愭枡杩涜绾崇背鍖栧鐞嗗彲浠ュ噺灏忕矑寰勩€佹彁楂楲i+鐨勬墿鏁ｇ郴鏁帮紝浠庤€屾敼鍠勬潗鏂欑殑鐢靛寲瀛︽€ц兘銆傞€氳繃瀵肩數纰虫潗鏂欏LiFePO4棰楃矑杩涜琛ㄩ潰淇グ锛屽彲浠ユ彁楂樻潗鏂欑殑瀵肩數鐜囷紝鍑忓皬绂诲瓙涔嬮棿鐨勯樆鎶楋紝浠庤€屾彁楂樻潗鏂欑殑鍙€嗘瘮瀹归噺銆傚湪棰楃矑鍐呴儴鎺烘潅閲戝睘绮掑瓙鎴栭噾灞炵瀛愬彲浠ュ湪鏅舵牸涓瀯鎴愮┖绌存垨鐣稿彉锛屼粠鑰屾湁鏁堟彁楂樻潗鏂欑殑鐢靛鐜囥€侟/span>

1.1纰冲寘瑕咟/span>

纰冲叿鏈変紭鑹殑瀵肩數鎬ц兘鍜岃緝浣庣殑璐ㄩ噺瀵嗗害锛屽湪LiFePO4棰楃矑琛ㄩ潰鍖呰纰虫棦鍙互鎻愰珮棰楃矑闂寸殑瀵肩數鎬у拰鍑忓皬鐢垫睜鐨勬瀬鍖栵紝鍙堝彲浠ヤ负LiFePO4鎻愪緵鐢靛瓙闅ч亾锛岀敤鏉ヨˉ鍋縇i+鑴卞祵杩囩▼涓殑鐢佃嵎骞宠　銆傜⒊鍖呰鍒嗕负涓ょ锛屽叾涓€涓哄師浣嶅寘瑕嗭紝鍏朵簩涓烘潗鏂欏悎鎴愬悗鐨勫寘瑕嗐€傚師浣嶅寘瑕嗗嵆鍦ㄥ師鏂欎腑鍔犲叆纰虫簮锛岃繖鏍锋棦鍙互鎻愰珮棰楃矑涔嬮棿鐨勭數瀵肩巼锛岃€屼笖鍦ㄥ悎鎴愯繃绋嬪湪瑁傝В鐨勭⒊鑳芥姂鍒禠iFePO4鏅剁矑鐨勯暱澶э紝鍚屾椂纰宠捣鍒拌繕鍘熷墏浣滅敤锛岄伩鍏岶e2+鐨勬哀鍖栵紝浠庤€屾彁楂樹骇鍝佺殑绾害銆侟/span>

1.2鎺烘潅

纰冲寘瑕嗗彧鑳藉鍖栧鍙嶅簲鐢熸垚LiFePO4棰楃矑鐨勯暱澶ф湁涓€瀹氱殑鎶戝埗浣滅敤锛岃€屽鍖栧鍙嶅簲杩囩▼褰卞搷涓嶅ぇ銆傚鏋淟iFePO4棰楃矑灏哄涓嶅灏忔椂鍒欏緢闅捐幏寰楄緝濂界殑鐢靛寲瀛︽€ц兘銆傚湪杩欑鎯呭喌涓嬪彲浠ュ湪LiFePO4鏅舵牸姹囨€绘幒鏉傚悎閫傜殑鍏冪礌鏉ュ噺灏忓甫闅欏搴︼紝鎻愰珮鐢靛瓙鐢靛鐜囷紝璇卞鏅舵牸鐣稿彉锛屾彁楂楲i+鍦ㄦ櫠鏍间腑鐨勬墿鏁ｇ巼銆?nbsp;

绗竴鎬у師鐞嗚绠楃粨鏋滆〃鏄嶭iFePO4鏄竴绉嶇甯﹀绾︿负0.3eV鐨勫崐瀵间綋锛屾湭鎺烘潅鐨凩iFePO4鏄痭鍨嬪崐瀵间綋锛屽叾娲诲寲鑳芥帴杩?00eV锛岃€屾幒鏉傚悗鐨凩iFePO4鏄痯鍨嬪崐瀵间綋锛屽叾娲诲寲鑳介檷浣庤嚦60~80eV锛屽厖鏀剧數杩囩▼涓紝闅忕潃Li+娴撳害鐨勫彉鍖栵紝鏅朵綋鍐峱鍨嬪拰n鍨嬩箣闂磋浆鍙樸€侟/span>

鎺烘潅鐨勭瀛愭寜鍏剁被鍨嬪彲鍒嗕负閲戝睘绂诲瓙鍜岄潪閲戝睘绂诲瓙锛涙寜鎺烘潅閲忓彲鍒嗕负涓€鍏冩幒鏉傚拰澶氬厓鎺烘潅銆傝〃1鏄剧ず浜嗘幒鏉傜绫诲拰鎺烘潅閲忕殑涓嶅悓瀵规潗鏂欑殑鐢靛寲瀛︽€ц兘鏈変笉鍚岀殑褰卞搷銆傚洜姝わ紝鍦ㄥ疄闄呮幒鏉傝繃绋嬩腑锛屽彲浠ラ€氳繃鎺烘潅鍚勭绫诲瀷鍏冪礌鏉ョ患鍚堟彁楂樻潗鏂欑殑鎬ц兘銆侟/span>

姝ゅ锛屽苟涓嶆槸鎵€鏈夌殑绂诲瓙鍧囧彲浣滀负鎺烘潅鐨勭瀛愶紝瀹為獙涓湪閫夋嫨鎺烘潅绂诲瓙鏃堕渶瑕佽€冭檻浠ヤ笅鍥犵礌銆?1)鎺烘潅绂诲瓙鐨勫寲鍚堜环锛氭幒鏉傜瀛愮殑鍖栧悎浠锋€佽秺楂橈紝瓒婂鏄撳湪鏅舵牸涓舰鎴愬ぇ閲忕殑绌虹┐鍜岀暩鍙橈紝浣块攤绂诲瓙鎵╂暎鐜囧拰鐢靛瓙鐢靛鐜囪秺濂姐€?2)鎺烘潅绂诲瓙鐨勫崐寰勶細鎺烘潅绂诲瓙鍗婂緞搴斾笌鎵€鏇夸唬鐨勭瀛愬崐寰勮繎浼硷紝浠ュ埄浜庢幒鏉備綅鐐圭殑鍙栦唬銆侟/span>

1.3鏉愭枡绾崇背鍖朁/span>

Li+鍦ㄦ﹦姒勭煶鍨婰iFePO4鏅舵牸涓殑杈撹繍鍏锋湁杈冮珮鐨勫悇鍚戝紓鎬э紝涓斿叾鎵╂暎閫氶亾鏄竴缁寸殑锛屽湪涓€瀹氱▼搴︿笂闄愬埗浜哃i+鐨勪紶杈撴晥鐜囷紝鍥犳锛屼慨楗扮矑瀛愬舰鎬佷互鍑忓皬棰楃矑鐨勭矑寰勬潵缂╃煭Li+鐨勬墿鏁ｈ矾寰勶紝瀵瑰叾鐢靛寲瀛︽€ц兘鍏锋湁閲嶈鎰忎箟銆傛潗鏂欑撼绫冲寲锛屼竴鏂归潰鏈夊埄浜庣缉鐭瀛愮殑鎵╂暎璺緞锛屾彁楂樻潗鏂欑殑寰幆鎬ц兘锛涘彟涓€鏂归潰鏈夊埄浜庢墿澶ф潗鏂欑殑姣旇〃闈㈢Н锛屼负鐣岄潰鍙嶅簲鎻愪緵鏇村鐨勬墿鏁ｉ€氶亾銆侟/span>

PART 02

鎵弿鐢甸暅瀵筁iFePO4姝ｆ瀬鏉愭枡鐨勮〃寰?/strong>

鍑忓皬LiFePO4棰楃矑绮掑緞鏄彁楂樻瘮瀹归噺銆佸€嶇巼鎬ц兘鐨勬渶閲嶈銆佹渶鏈夋晥鐨勯€斿緞涔嬩竴銆傜矑寰勮秺灏忥紝鐢垫瀬鍜岀數瑙ｈ川涔嬮棿鐨勬帴瑙﹂潰绉秺澶э紝閿傜瀛愬拰鐢靛瓙鐨勪紶杈撹矾寰勮秺鐭€傛湁鐮旂┒鍙戠幇锛孡iFePO4姝ｆ瀬鏉愭枡鐨勬斁鐢靛閲忛殢鐫€LiFePO4棰楃矑鐨勭矑寰勫澶ц€屽噺灏忥紙濡傚浘1鎵€绀猴級銆傜粡璁＄畻寰楀嚭锛屽叾鍗曚綅璐ㄩ噺鐢垫瀬鐢甸樆涓嶭iFePO4棰楃矑绮掑緞鍏崇郴绗﹀悎缁忛獙鍏紡锛歊m=Adn锛坣=2锛夛紝浠庡浘涓€荤粨锛岀矑寰勫澶э紝瀵艰嚧鏉愭枡鐨勭數闃荤浉搴斿鍔狅紝Li+鍜岀數瀛愬湪LiFePO4棰楃矑鍐呴儴鐨勪紶杈撴洿鍔犲洶闅俱€侟/p>

鍥?锛 LiFePO4姝ｆ瀬鏉愭枡鐨勬斁鐢靛閲忎笌绮掑緞鍏崇郴鏇茬嚎鍥近/p>

鍥?锛氱數鏋佺數闃讳笌LiFePO4棰楃矑骞冲潎绮掑緞鐨勫叧绯绘洸绾垮浘

Apreo2鎵弿鐢甸暅鐨勯暅绛掑唴鐨凾2鎺㈡祴鍣ㄤ负YAG鏉愯川锛屾帰娴嬬伒鏁忓害鏋侀珮锛屽彲杞绘澗鑾峰彇浣庣數鍘嬩笅鐨勯珮鍒嗚鲸鍥惧儚锛岄潪甯搁€傚悎琛ㄥ緛LiFePO4棰楃矑鐨勫舰璨岀壒寰侊紝濡傚浘3鎵€绀猴紝浣跨敤T2鎺㈡祴鍣ㄨ瀵熷埌a銆乥涓や釜涓嶅悓宸ヨ壓鏉′欢鍒跺鐨凩iFePO4棰楃矑鐨勭矑寰勫叿鏈夋槑鏄惧樊寮傦紝鐮旂┒鑰呭湪姝ゅ熀纭€涓婂彲缁х画杩涜LiFePO4姝ｆ瀬鏉愭枡鐨勭數鍖栧鎬ц兘鐮旂┒锛屼粠鑰屽府鍔╂敼鍠勫埗澶囧伐鑹恒€侟/p>

鍥?锛歛锛堝乏锛夊拰b锛堝彸锛変负涓嶅悓宸ヨ壓鍒跺鐨凩iFePO4棰楃矑鐨凷EM鍥近/p>

LiFePO4鐨勫鐢垫€у樊锛?0-9~10-10Scm-1锛夊鑷村叾楂樺€嶇巼鎬ц兘涓嶄匠锛岄檺鍒朵簡鍏跺湪澶у姛鐜囩數鍖栧绯荤粺涓殑瀹為檯搴旂敤锛屾瀯寤哄閮ㄩ珮瀵肩數鎬х綉缁滐紝淇冭繘鐢靛瓙蹇€熶紶閫掓槸瑙ｅ喅璇ラ棶棰樼殑涓€涓瓥鐣ワ紝姣斿鍒跺LiFePO4/C澶嶅悎鏉愭枡銆傚涓嬪浘4鎵€绀猴紝鍦↙iFePO4棰楃矑琛ㄩ潰鍖呰钖勭墖鐘剁⒊灞傦紝璇ョ粨鏋勭殑纰虫潗鏂欏叿鏈変簩缁寸墖灞傜粨鏋勶紝鍏锋湁楂樺鐢垫€с€侀珮姣旇〃闈㈢Н浠ュ強浼樿壇鐨勫寲瀛︾ǔ瀹氭€э紝涓篖i+鍜岀數瀛愭彁渚涘揩閫熶紶杈撳拰杩佺Щ閫氶亾锛屼粠鑰屾彁楂樹簡LiFePO4姝ｆ瀬鏉愭枡鐨勭數鍖栧鎬ц兘銆侟/p>

鍥? 锛歀iFePO4/C澶嶅悎鏉愭枡鐨凷EM鍥近/p>

Apreo2 SEM浠嬬粛

Apreo2 SEM鏄竴娆惧叿鏈夎秴楂樺垎杈ㄨ兘鍔涚殑鏅鸿兘鍖栫▼搴︽瀬楂樼殑閫氱敤鍨嬪満鍙戝皠鎵弿鐢甸暅銆侟/strong>鍑€烼hermo Scientific Smart Align 鎶€鏈紙杞欢鑷姩鍏夊瀵逛腑锛夛紝Apreo2 SEM瀵圭敤鎴峰拰瀹為獙瀹ょ鐞嗕汉鍛樼殑瑕佹眰闈炲父浣庛€傛澶栵紝Apreo2 SEM 閲囩敤 Thermo Scientific FLASH 鎶€鏈紝鍙疄鐜拌嚜鍔ㄧ數瀛愭潫瀵逛腑銆佹秷鍍忔暎鍜岃仛鐒︾瓑鎿嶄綔锛岃繖椤规妧鏈殑鎺ㄥ嚭鎰忓懗鐫€鍗充娇鏄壂鎻忕數闀滅殑鏂版墜鐢ㄦ埛涔熷彲浠ヨ交鏉捐幏寰 Apreo2 SEM 鐨勬瀬鑷存€ц兘銆傚彟澶朅preo2閰嶅鐨勫涓帰娴嬪櫒锛圗TD銆乀1銆乀2銆乀3锛夛紝鐢ㄦ埛鍙幏鍙栬冻澶熺殑鏍峰搧淇℃伅骞跺垎鏋愩€侟/p>

Apreo2 SEM杩橀厤澶囦簡Maps 3杞欢锛屽彲瀹炵幇澶ч潰绉嫾鍥惧姛鑳斤紝濡備笅鍥?鎵€绀猴紝涓?25寮?0000鍊嶄笅鐨勭収鐗囪嚜鍔ㄦ媿鎽勫悗鎷兼帴鑰屾垚锛屽彲鏀惧ぇ浠绘剰灞€閮ㄥ尯鍩熻瀵熺粏鑺傘€侫preo2 SEM鏄竴娆惧姛鑳介綈鍏ㄧ殑楂樺垎杈ㄥ満鍙戝皠鎵弿鐢甸暅锛屾惌閰嶅绉嶆帰娴嬪櫒锛屼互鍙婂己澶х殑鏅鸿兘鍖栬蒋浠舵敮鎾戯紝鍙交鏉惧姪鍔涢攤鐢垫睜琛屼笟鐨勬潗鏂欒〃寰佺爺绌躲€侟/p>

鍥?:浣跨敤Maps 3杞欢鎷兼帴鑰屾垚鐨勫ぇ闈㈢НSEM鍥近/p>

鐩稿叧闃呰銆婇攤绂诲瓙鐢垫睜姝ｆ瀬鏉愭枡鐨勬敼鎬х爺绌讹紙涓€锛塋iFePO4鐨勭粨鏋勭壒寰佸強鍒跺鏂规硶銆婞/p>

鍙傝€冩枃鐚細

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3銆佸紶鍏嬪畤, 濮氳€€鏄? 閿傜瀛愮數姹犵７閰搁搧閿傛鏋佹潗鏂欑殑鐮旂┒杩涘睍. 鍖栧伐杩涘睍, 2015(1): 166-172.

4銆佽嫃鐜夐暱, 榫氱懢鐟? 姹ゆ椽娉㈢瓑. 姘寸儹娉曞悎鎴愮撼绫矻iFePO4/鐭冲ⅷ鐑鍚堟潗鏂欑殑缁勭粐缁撴瀯鍙婂叾鍏夊鐗规€?鐭垮喍宸ョ▼, 2015, 35(5): 117-120.

5銆両mprovement on high rate performance of LiFePO4 cathodes using graphene as a conductive agent. Applied Surface Science, 2018, 440: 748-754.

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