当前位置: X-MOL 学术Appl. Surf. Sci. › 论文详情
Boosting high-voltage cyclic stability of nickel-rich layered cathodes in full-cell by metallurgy-inspired coating strategy
Applied Surface Science ( IF 5.155 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.apsusc.2020.145380
Yingjie Zhang; Guanghui Xia; Jufeng Zhang; Ding Wang; Peng Dong; Jianguo Duan

Increasing the cutoff voltage is an effective way to boost the energy density of lithium ion full-cells which use the layered nickel-rich oxides. However, the practical application of nickel-rich cathode is severely hindered by the structural degradation and grave capacity loss. Herein, we find that the deterioration of full-cell capacity retention is correlated with the lithium loss in the anode solid electrolyte interphase (SEI) especially at high voltage. The Ni and Mn ions dissolved from the cathode deposit in the anode SEI triggers lithium trapping, and consequently expedites the consumption of cyclical lithium ions. Be based on this finding, an innovative metallurgy-inspired approach of creating a uniform hydroxide layer on the cathode surface and inhibiting separate nucleation of hydroxide that employ carbon dioxide as acidic inducing precipitant, is introduced. Finally, the ultra-thin Al2O3-encapsulated cathodes are obtained after annealing process. Benefiting from the prominent physical-chemical protection function of nanoscale oxide layer, the developed cathode exhibits outstanding cycle durability in full-cell with a capacity retention of ∼80% after 800 cycles at 25 °C. Notably, the modified full-cell possesses well thermal stability go through nail penetration test. This work offers an industrial-scale coating paradigm toward high performance nickel-rich cathode for application in full-cells.
更新日期:2020-01-13

 

全部期刊列表>>
化学/材料学中国作者研究精选
ACS材料视界
南京大学
自然科研论文编辑服务
剑桥大学-
中国科学院大学化学科学学院
南开大学化学院周其林
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug