电池工业
電池工業
전지공업
CHINESE BATTERY INDUSTRY
2014年
3期
119-122
,共4页
硅碳复合负极材料%乳化沥青%固体粉末沥青%锂离子电池%包覆
硅碳複閤負極材料%乳化瀝青%固體粉末瀝青%鋰離子電池%包覆
규탄복합부겁재료%유화력청%고체분말력청%리리자전지%포복
Si-carbon composite anode materials%emulsified asphalt%solid bituminite%Li-ion bat-tery%coating
分别采用乳化沥青和固体粉末沥青为包覆剂制备了硅碳锂离子电池负极材料,对材料进行了XRD、SEM 表征,以及进行了循环伏安法等测试。使用乳化沥青为包覆剂制备的硅碳复合负极材料为类球状,形貌规整,首次容量为522 mAh/g,效率达88.8%,循环10次后平均每周容量衰减1.6 mAh/g。使用固体粉末沥青为包覆剂制备的硅碳负极材料为无规则形状,首次容量为480 mAh/g,首次库伦效率为87.9%,循环10次后平均每周容量衰减1.9 mAh/g。使用乳化沥青为包覆剂整体性能要好于使用固体粉末沥青为包覆剂制备的硅碳复合负极材料。
分彆採用乳化瀝青和固體粉末瀝青為包覆劑製備瞭硅碳鋰離子電池負極材料,對材料進行瞭XRD、SEM 錶徵,以及進行瞭循環伏安法等測試。使用乳化瀝青為包覆劑製備的硅碳複閤負極材料為類毬狀,形貌規整,首次容量為522 mAh/g,效率達88.8%,循環10次後平均每週容量衰減1.6 mAh/g。使用固體粉末瀝青為包覆劑製備的硅碳負極材料為無規則形狀,首次容量為480 mAh/g,首次庫倫效率為87.9%,循環10次後平均每週容量衰減1.9 mAh/g。使用乳化瀝青為包覆劑整體性能要好于使用固體粉末瀝青為包覆劑製備的硅碳複閤負極材料。
분별채용유화력청화고체분말력청위포복제제비료규탄리리자전지부겁재료,대재료진행료XRD、SEM 표정,이급진행료순배복안법등측시。사용유화력청위포복제제비적규탄복합부겁재료위류구상,형모규정,수차용량위522 mAh/g,효솔체88.8%,순배10차후평균매주용량쇠감1.6 mAh/g。사용고체분말력청위포복제제비적규탄부겁재료위무규칙형상,수차용량위480 mAh/g,수차고륜효솔위87.9%,순배10차후평균매주용량쇠감1.9 mAh/g。사용유화력청위포복제정체성능요호우사용고체분말력청위포복제제비적규탄복합부겁재료。
Si-carbon composite anode materials was synthesized by emulsified asphalt and solid bi-tuminite as coating agent,respectively.The composite was analyzed by XRD,SEM and cyclic voltammetry etc.The morphology of the composite coated with emulsified asphalt was regular and globe-like,with the first capacity of 522 mAh/g,coulombic efficiency of 88.8% and average loss 1.6 mAh/g weekly after 10 cycles.However,the morphology of the composite coated with solid bituminite was irregular with first capacity of 480 mAh/g and coulombic efficiency of 87.9%and average loss 1.9 mAh/g weekly after 10 cycles.The overall performance of the former is bet-ter than the latter.