期刊
ENERGY STORAGE MATERIALS
卷 45, 期 -, 页码 474-483出版社
ELSEVIER
DOI: 10.1016/j.ensm.2021.12.004
关键词
Polycarbonate; Oxidative stability; In-situ polymerization; Lithium metal batteries; Cross-linked polymer electrolyte; Ionic conductivity
资金
- State Key Program of National Nat-ural Science Foundation of China [51633007, 52130303]
- National Natural Science Foundation of China [51773147, 51973151]
Polymer-based solid-state lithium metal batteries are considered ideal for portable and flexible devices due to increasing energy demand. This study introduces a fluorine containing polycarbonate-based electrolyte to expand the electrochemical window and improve ionic conductivity, allowing for the use of high-energy-density cathode materials. The proposed polycarbonate electrolyte shows promise for further application in high-voltage cathode materials for lithium metal batteries (LMBs).
Polymer-based solid-state lithium metal batteries (LMBs) are considered as an ideal power source for portable and flexible devices due to the consecutively increasing energy demand. However, the relatively narrow electrochemical window of conventional polyethylene-oxide-based polymer electrolytes limits the application of high-energy-density cathode materials for LMBs. To overcome these limitations, herein, we designed a fluorine containing polycarbonate-based electrolyte to expand the electrochemical window up to above 5 V (vs. Li/Li+); this electrolyte exhibits an ionic conductivity of 5.02 x 10(-5) S cm(-1) at room temperature. The addition of fluorine containing groups significantly increased the oxidation potential of the electrolyte. The corresponding NCM811 LMBs assembled through in-situ polymerization on the surface of lithium metals exhibited a specific capacity of 218 mAh g(-1) at 0.1 C (1 C = 275 mA g(-1)), with a capacity retention of > 70% after 300 cycles under ambient circumstance. The proposed polycarbonate electrolyte has considerable potential for the further application in LMBs comprising high-voltage cathode materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据