边锋游戏

关于锂电池电解液
发布时间:2019-03-13 15:25:57
关键词:动力电池锂电池

关于锂电池电解液


ZAICHUANTONGDIANCHIZHONG,TONGCHANGSHIYONGSHUIZUOWEIRONGJIDEDIANJIEYETIXI,DANSHIYOUYUSHUIDELILUNFENJIEDIANYAWEI1.23V,KAOLVDAOQINGHUOYANGDEGUODIANWEI,YISHUIWEIRONGJIDEDIANJIEYETIXIDEDIANCHIDIANYAZUIGAOYEZHIYOU2VZUOYOU(LIRUQIANSUANDIANCHI);ZAILILIZIDIANCHIZHONG,DIANCHIDEGONGZUODIANYATONGCHANGGAODA3~4V,CHUANTONGDESHUIRONGYEYIBUZAISHIYONG,YINCIBIXUCAIYONGFEISHUIDIANJIEYETIXIZUOWEILILIZIDIANCHIDEDIANJIEYE。QIZHONGFEISHUIYOUJIRONGJISHIDIANJIEYEDEZHUTICHENGFEN。


边锋游戏DANDUIYUXINXINGSHUIXIDIANJIEYEDEKAIFA,YIZHIMEIJIANDUAN,JINQIBEIDASHENYANYUANPANFENGTUANDUIJIUJINXINGLESHUIXIDIANJIEYEKAIFA,BINGQUDELEXINTUPO(DIANJIXIAFANGBIAOTITIAOZHUANXIANGXIBAODAO)。



一、电解液的主要成分

电解液主要由三部分构成

(1)溶剂:环状碳酸酯(PC、EC);链状碳酸酯(DEC、DMC、EMC);羧酸酯类(MF、MA、EA、MA、MP等);(用于溶解锂盐)

(2)LIYAN:LiPF6、LiClO4、LiBF4、、LiAsF6DENG;

(3)TIANJIAJI:CHENGMOTIANJIAJI、DAODIANTIANJIAJI、ZURANTIANJIAJI、GUOCHONGBAOHUTIANJIAJI、KONGZHIDIANJIEYEZHONGH2OHEHFHANLIANGDETIANJIAJI、GAISHANDIWENXINGNENGDETIANJIAJI、DUOGONGNENGTIANJIAJI;

YONGYULILIZIDIANCHIDEDIANJIEZHIYINGGAIMANZUYIXIAJIBENYAOQIU

a.GAODELIZIDIANDAOLV,YIBANYINGDADAO1x10-3~2x10-2 S/cm;

b.GAODEREWENDINGXINGHEHUAXUEWENDINGXING,ZAIJIAOKUANDEDIANYAFANWEINEIBUFASHENGFENLI;

c.JIAOKUANDEDIANHUAXUECHUANGKOU,ZAIJIAOKUANDEDIANYAFANWEINEIBAOCHIDIANHUAXUEXINGNENGDEWENDING;

边锋游戏d.YUDIANCHIQITABUFENLIRUDIANJICAILIAO、DIANJIJILIUTIHEGEMODENGJUYOULIANGHAODEXIANGRONGXING;

边锋游戏e.ANQUAN、WUDU、WUWURANXING。


主要溶剂组分理化参数


主要溶剂组分充电过程中的反应


几种常用锂盐的简单性能对比

LiBF4:DIWENXINGNENGBIJIAOHAO,DANSHIJIAGEANGGUIHERONGJIEDUBIJIAODI;

边锋游戏LiPF6:ZONGHEXINGNENGBIJIAOHAO,QUEDIANSHIYIXISHUISHUIJIE;

LiAsF6:ZONGHEXINGNENGBIJIAOHAO,DANSHIDUXINGTAIDA;

LiClO4:ZONGHEXINGNENGBIJIAOHAO,DANSHIQIANGYANGHUAXINGDAOZHIANQUANXINGBUGAO;

边锋游戏LiBOB:GAOWENXINGNENGBIJIAOHAO,YOUQINENGNIZHIRONGJIDUIFUJIDECHARUPOHUAI,DANSHIRONGJIEDUTAIDI。


电解质锂盐在充电过程中的反应


电解质锂盐的一些理化参数


二、电解液添加剂主要分类


成膜添加剂

YOULIANGDESEIMO(GUTIDIANJIEZHIBOMO)JUYOUYOUJIRONGJIBURONGXING,YUNXULILIZIZIYOUDEJINCHUDIANJIERRONGJIFENZIWUFACHUANYUE,CONGERZUZHIRONGJIFENZIGONGCHADUIDIANJIDEPOHUAI,TIGAODIANCHIDEXUNHUANXIAOLVHEKENIRONGLIANGDENGXINGNENG。

QIZHUYAOFENWEIWUJICHENGMOTIANJIAJI(SO2、CO2、CODENGXIAOFENZIYIJILUHUALIDENG)HEYOUJICHENGMOTIANJIAJI(FUDAI、LVDAIHEXIUDAITANSUANZHIDENG,JIEZHULUSUYUANZIDEXIDIANZIXIAOYINGTIGAOZHONGXINYUANZIDEDEDIANLINENGLI,SHITIANJIAJIZAIJIAOGAODEDIANWEITIAOJIANXIAHAIYUANBINGYOUXIAODUNHUADIANJIBIAOMIAN,XINGCHENGWENDINGDESEIMO。)LINGYOUSonyGONGSIZHUANLIBAODAO,ZAILILIZIDIANCHIFEISHUIDIANJIEYEZHONGJIARUWEILIANGBENJIAMIHUOQILUDAIYANSHENGWU,NENGGAISHANDIANCHIDEXUNHUANXINGNENG,JIANSHAODIANCHIBUKENIRONGLIANGDESUNSHI。


导电添加剂

DUITIGAODIANJIEYEDAODIANNENGLIDETIANJIAJIDEYANJIUZHUYAOZHEYANYUTIGAODAODIANLIYANDERONGJIEHEDIANLIYIJIFANGZHIRONGJIGONGCHADUIDIANJIDEPOHUAI。

QIANZUOYONGLEIXINGKEFENWEIYUYANGLIZIZUOYONGXING(ZHUYAOBAOKUOYIXIEANLEIHEFENZIZHONGHANYOULIANGGEDANYUANZIYISHANGDEFANGXIANGZAHUANHUAHEWUYIJIGUANMIHEXUEZHUANGHUAHEWU)、YUYINLIZIZUOYONGXING(YINLIZIPEITIZHUYAOSHIYIXIEYINLIZISHOUTIHUAHEWU,RUPENGJIHUAHEWU)JIYUDIANJIEZHILIZIZUOYONGXING(ZHONGXINGPEITIHUAHEWUZHUYAOSHIYIXIEFUDIANZIJITUANJIANHEQUEDIANZIYUANZINHUOBXINGCHENGDEHUAHEWU,RUDANZAMILEIHEWANJIPENGLEI)。


阻燃添加剂

作为商业化应用,锂离子蓄电池的安全问题依然是制约其应用发展的重要因素。锂离子蓄电池自身存在着许多安全隐患,如充电电压高,而且电解质多为有机易燃物,若使用不当,电池会发生危险甚至爆炸。因此,改善电解液的稳定性是改善锂离子电池安全性的一个重要方法。在电池中添加一些高沸点、高闪点和不易燃的溶剂可改善电池的安全性。

ZHUYAOFENWEI:(1)YOUJILINHUAWU (2)YOUJIFUDAIHUAHEWU (3)LUDAIWANJILINSUANZHI


过充保护添加剂

DUIYUCAIYONGYANGHUAHAIYUANDUIJINXINGNEIBUBAOHUDEFANGFARENMENJINXINGLEGUANGFANDEYANJIU,ZHEIZHONGFANGFADEYUANLISHITONGGUOZAIDIANJIEYEZHONGTIANJIAHESHIDEYANGHUAHAIYUANDUI,ZAIZHENGCHANGCHONGDIANSHIZHEIGEYANGHUAHAIYUANDUIBUCANJIARENHEHUAXUEHUODIANHUAXUEFANYING,ERDANGDIANCHICHONGMANDIANHUOLVEGAOYUGAIZHISHI,TIANJIAJIKAISHIZAIZHENGJISHANGYANGHUA,RANHOUKUOSANDAOFUJIFASHENGHAIYUANFANYING,RUXIASHISUOSHI。

ZHENGJI:R→O+ne-

FUJI:O+ne-→R

ZUIJIADEGUOCHONGDIANBAOHUTIANJIAJIYINGGAIJUYOU4.2~4.3VDEJIEZHIDIANYA,CONGERMANZULILIZIXUDIANCHIDAYU4VDIANYADEYAOQIU,ZONGDELAISHUO,ZHEIYIBUFENDEYANJIUGONGZUOHAIYOUDAIJINYIBUYANJIU。


控制电解液中水和HF含量的添加剂

边锋游戏YOUJIDIANJIEYEZHONGCUNZAIDEHENLIANGSHUIHEHFDUIXINGNENGYOULIANGDESEIMODEXINGCHENGSHIYOUYIDINGZUOYONGDE,ZHEIXIEDOUKEYICONGEC、PCDENGRONGJIZAIDIANJIJIEMIANDEFANYINGZHONGKANCHU。DANSHUIHESUAN(HF)DEHANLIANGGUOGAO,BUJINHUIDAOZHILiPF6DEFENJIE,ERQIEHUIPOHUAISEIMO。DANGAl2O3、MgO、BaOHELIHUOGAIDETANSUANYANDENGZUOWEITIANJIAJIJIARUDAODIANJIEYEZHONG,TAMENJIANGYUDIANJIEYEZHONGWEILIANGDEHFFASHENGFANYING,JIANGDIHFDEHANLIANG,ZUZHIQIDUIDIANJIDEPOHUAIHEDUILiPF6FENJIEDECUIHUAZUOYONG,TIGAODIANJIEYEDEWENDINGXING,CONGERGAISHANDIANCHIXINGNENG。DANZHEIXIEWUZHIQUCHUHFDESUDUJIAOMAN,YINCIHENNANZUODAOZUZHIHFDUIDIANCHIXINGNENGDEPOHUAI。

ERYIXIESUANGANLEIHUAHEWUSUIRANNENGJIAOKUAIDIQUCHUHF,DANHUITONGSHICHANSHENGPOHUAIDIANCHIXINGNENGDEQITASUANXINGWUZHI。WANTINGERYAANLEIHUAHEWUNENGTONGGUOFENZIZHONGDEQINGYUANZIYUSHUIFENZIXINGCHENGJIAORUODEQINGJIAN,CONGERZUZHISHUIYULiPF6,FANYINGCHANSHENGHF。


改善低温性能的添加剂

低温性能为拓宽锂离子电池边锋游戏使用范围的重要因素之一,也是目前航天技术中必须具备的。N,N一二甲基三氟乙酰胺的黏度低(1.09mPa·S,25°C)、沸点(135°C)和闪点(72°C)高,在石墨表面有较好的成膜能力,对正极也有较好的氧化稳定性,组装的电池在低温下具有优良的循环性能。有机硼化物、含氟碳酸酯也有利于电池低温性能的提高。


多功能型添加剂

DUOGONGNENGTIANJIAJISHILILIZIDIANCHIDELIXIANGTIANJIAJI,TAMENKEYICONGDUOFANGMIANGAISHANDIANJIEYEDEXINGNENG,DUITIGAOLILIZIDIANCHIDEZHENGTIDIANHUAXUEXINGNENGJUYOUTUCHUZUOYONG。ZHENGZAICHENGWEIWEILAITIANJIAJIYANJIUHEKAIFADEZHUGONGFANGXIANG。

SHIJISHANG,XIANYOUDEMOUXIETIANJIAJIBENSHENJIUSHIDUOGONGNENGTIANJIAJI。LIRU,12-GUAN-4JIARUPCRONGJIHOU。ZAITIGAOLi+DEZISHENDAODIANXINGDETONGSHI,LIYONGGUANZHUANGPEITIZAIDIANJIBIAOMIANDEQINDIANZUOYONGSHIDELi+ZAIDIANJIJIEMIANYURONGJIFENZIFANYINGDEKENENGXINGDADAJIANGDI,GUANMIDUILi+DEYOUSHIRONGJIHUAZUOYONGYIZHILEPCFENZIGONGCHA,DIANJIJIEMIANSEIMODEDAOYOUHUA,JIANSHAOLEDIANJISHOUCIBUKENIRONGLIANGSUNSHI。

边锋游戏CIWAI,FUHUAYOUJIRONGJI、LUDAILINSUANZHIRUBTEHETTFPJIARUDIANJIEYEHOU,BUJINYOUZHUYUXINGCHENGYOULIANGDESEIMO,TONGSHIDUIDIANJIEYEJUYOUYIDINGDESHENZHIMINGXIANDEZURANZUOYONG,GAISHANLEDIANCHIDUOFANGMIANXINGNENG。


三、电解液制作中注意的问题

边锋游戏1.KAOLVDAODIANCHIQIAOTIXINGZHUANGBUTONG,YINGSHIDANGZENGJIADIANJIEYERUNSHIXING;

2.KAOLVDAODIANCHIDUIRONGLIANGYIJIFANGDIANSULVYAOQIUBUTONG,DIAOPEIDIANJIEYEDIANDAOLVDENG;

3.GENJUDIANJICAILIAOYIJIJUTIFANGDIANYAOQIUBUTONG,DIAOPEITIANJIAJIDEYONGLIANGBUTONG;

4.GENJUDUIDIANJIEYEYONGLIANGJUEDINGDECHUCUNSHIJIANZHANGDUAN,JUEDINGDIANYEZHONGWENDINGJIDEQUSHE。

TONGGUOSHANGMIANDEJIESHAO,XIANGBIDAJIAYIJINGDUILILIZIDIANCHIDIANJIEZHIYOUYIGEDATIDELEJIELE。ZONGDELAISHUO,RONGJITIXI、TIANJIAJIDEZUOYONG、LIYANXINGNENG、SHUIFENSUANDUKONGZHI、YUDIANJICAILIAODEJIANRONGXINGDENGGONGTONGJUEDINGLEDIANJIEYEDEXINGNENG。ERDIANJIEYEYOUSHILILIZIDIANCHIDEZHONGYAOZUCHENGBUFEN,SUOYIBAWOHAODIANJIEYEGEGEZUCHENGBUFENSHIWOMENNENGGOUCHONGFENFAHUIDIANCHIXINGNENGDEGUANJIAN。


稿件来源: 微算云平台
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