一种可同时用于钠离子和钾离子电池的Bi2S3基负极材料初探  

Preliminary Research on a Bi2S3-based Anode Material for Both Na-ion and K-ion Batteries

作　　者：乔双燕 魏学东 Qiao Shuangyan;Wei Xuedong(Modern College of Arts and Science,Shanxi Normal University,Shanxi,041000;School of Chemistry and Materials Science,Shanxi Normal University,Shanxi,030031)

机构地区：[1]山西师范大学现代文理学院,山西041000 [2]山西师范大学化学与材料科学学院,山西030031

出　　处：《当代化工研究》2023年第14期162-164,共3页Modern Chemical Research

基　　金：山西师范大学现代文理学院基础研究项目“基于非贵金属的低维无机物纳米组分自组装MOF纳米片(晶)复合物的构筑及电催化机理研究”(项目编号:2020JCYJ11)。

摘　　要：Bi_(2)S_(3)是一种有潜力的转换合金化负极材料,它具有较高的首次可逆钠离子充/放电容量567.6m Ah·g^(-1)/744.2m Ah·g^(-1)和钾离子充/放电容量464.3m Ah·g^(-1)/984.5m Ah·g^(-1),但稳定性和倍率性能均有待改善。同步进行掺氮碳层包覆(Bi_(2)S_(3)@NC)和石墨烯包覆(Bi_(2)S_(3)@rGO)实验后,发现NC包覆效果不明显,而rGO在较少容量损失的前提下,大幅改善循环稳定性,经100次循环后分别用于钠离子和钾离子存储均可维持100m Ah·g^(-1)左右的可逆容量。且倍率性能改善更为明显,2000mA·g^(-1)时,Bi_(2)S_(3)@rGO仍能保持183.9mAh·g^(-1)的高可逆钠离子存储容量。Bi_(2)S_(3) is a potential conversion alloyed anode material,it has high first reversible sodium ion charge/discharge capacity of 567.6 mAh·g^(-1)/744.2 mAh·g^(-1) and potassium ion charge/discharge capacity of 464.3 mAh·g^(-1)/984.5 mAh·g^(-1),however,the stability and rate performance need to be improved.After simultaneous experiments of nitrogen-doped carbon layer coating(Bi_(2)S_(3)@NC)and graphene coating(Bi_(2)S_(3)@rGO),it was found that the NC coating effect was not obvious,while rGO greatly improved the cycling stability under the premise of less capacity loss.After 100 cycles,the reversible capacity of about 100 mAh·g^(-1) can be maintained for sodium ion and potassium ion storage,respectively.And the rate performance is improved more obviously.At 2000 mA·g^(-1),Bi_(2)S_(3)@rGO can still maintain a high reversible sodium ion storage capacity of 183.9 mAh·g^(-1).

关 键 词：负极材料 Bi_(2)S_(3)基 钠离子 钾离子 转换合金化 

分 类 号：TM912[电气工程—电力电子与电力传动]