Extremely Accessible Potassium Nitrate (KNO3) as the Highly Efficient Electrolyte Additive in Lithium Battery

被引：140

作者：

Jia, Weishang ^{[1
]}

Fan, Cong ^{[1
]}

Wang, Liping ^{[1
]}

Wang, Qingji ^{[1
]}

Zhao, Mingjuan ^{[1
]}

Zhou, Aijun ^{[1
]}

Li, Jingze ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Microelect & Solid State Elect, Chengdu 610054, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 24期

基金：

美国国家科学基金会;

关键词：

potassium nitrate; synergetic effect; solid-electrolyte interphase; electrolyte additive; Li-S battery; SULFUR BATTERIES; DENDRITE GROWTH; METAL ANODES; ELECTROCHEMICAL PERFORMANCE; RECHARGEABLE BATTERIES; LICOO2; ELECTRODES; ENERGY DENSITY; LI METAL; LIQUID; POLYSULFIDE;

D O I：

10.1021/acsami.6b03897

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The systematic investigation of RNO3 salts (R = Li, Na, K, and Cs) as electrolyte additives was carried out for lithium-battery systems. For the first time, the abundant and extremely available KNO3 was proved to be an excellent alternative of LiNO3 for suppression of the lithium dendrites. The reason was ascribed to the possible synergetic effect of K+ and NO3- ions: The positively charged K+ ion could surround the lithium dendrites by electrostatic attraction and then delay their further growth, while simultaneously the oxidative NO3 ion could be reduced and subsequently profitable to the reinforcement of the solid electrolyte interphase (SEI). By adding KNO3 into the practical Li-S battery, the discharging capacity was enhanced to average 687 mAh g(-1) from the case without KNO3 (528 mAh g(-1)) during 100 cycles, which was comparable to the one with the well-known LiNO3 additive (637 mAh g(-1)) under the same conditions.

引用

页码：15399 / 15405

页数：7

共 42 条

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