教授
博士生导师
硕士生导师
教师拼音名称:liguicun
出生日期:1974-05-12
电子邮箱:
所在单位:材料学院综合办公室
职务:材料科学与工程学院院长
学历:博士研究生
办公地点:材料楼225房间
性别:男
联系方式:guicunli@qust.edu.cn Tel:13730918070
学位:工学博士
职称:教授
毕业院校:中国海洋大学
学科:材料物理与化学
2016-01-01 山东省有突出贡献的中青年专家
2012-11-07 山东省第三届优秀研究生指导教师
2011-04-01 青岛拔尖人才
最后更新时间:..
关键字:METAL BATTERIES; LITHIUM
摘要:Simple salts electrolyte is imperative for developing commercially feasible rechargeable magnesium (Mg) metal batteries. However, Mg electro-plating/stripping reversibility in these electrolytes is far from satisfactory, which is mainly caused by interfacial passivation and dendrite growth of Mg-metal anode. Therefore, it is of great urgent to develop a molecule-level mechanistic understanding on electrode-electrolyte interfacial reactions. In this work, the transformation pathways of solvents at the inner Helmholtz plane are revealed to play a key role in reversibility deterioration and cell failure of Mg-metal anodes. A benzylamine co-solvent is introduced into simple salts electrolyte, which is closely to gas evolution, MgH2 formation and possible electrochemical active species formation on surface of Mg-metal anodes. The uneven adsorption of active species leads to a multiplicative effect on local current density, which causes dendrite growth. Interestingly, benzylamine solvents are demonstrated to do not directly participate in the first Mg2 solvation sheath structures, instead they exhibit specific adsorption at the inner Helmholtz plane attributed to significant steric hindrance. As a result, visual bottle-type asymmetric cells display a fair cycle life of above 500 cycles, while coin-type assembly exhibits serious soft short circuit and recovery behavior during cycling.
卷号:35
期号:11
是否译文:否