Can I read Enhancing the Electrochemical Performance of Ni-Rich Layered Oxide Cathodes by Combination of the Gradient Doping and Dual-Conductive Layers Coating on EtoBox?

Enhancing the Electrochemical Performance of Ni-Rich Layered Oxide Cathodes by Combination of the Gradient Doping and Dual-Conductive Layers Coating by Qiwen Ran; Hongyuan Zhao; Xiaohui Shu; Youzuo Hu; Shuai Hao; Qianqian Shen; Wei Liu; Jintao Liu; Meiling Zhang; Hao Li; Xingquan Liu is a Engineering article available to read on EtoBox.

What is Enhancing the Electrochemical Performance of Ni-Rich Layered Oxide Cathodes by Combination of the Gradient Doping and Dual-Conductive Layers Coating about?

Currently, there is an urgent demand for Ni-rich cathode materials with excellent electrochemical properties under harsh conditions; however, obtaining such materials is very challenging. Here, we propose an innovative modification strategy that combines gradient phosphate polyanion doping and dual-conductive layer (Li 3 PO 4 -PANI) coating. The phosphate polyanion gradient doping can be described as acting in a "support role" to optimize the crystal structure. Moreover, the dual-conductive (Li 3 PO 4 -PANI) layers can be described as acting in a "palisade role" to inhibit side reactions and enhance the ionic/electronic conductivity of the NCM cathode. For the NCM cathode, this strategy synergistically achieves three main objectives: enhancement of structure stability, improvement of the ionic/electronic conductivity of the interface, and reduction of residual lithium salts. The modified NCM cathode delivers superior cycling stability, with 81.4% capacity retention after 100 cycles (4.5 V/55 °C), whereas the original NCM shows only a quite low capacity retention (57.7%). Moreover, this strategy also significantly improves the rate performance of the NCM cathode. These results indic

Who reads Enhancing the Electrochemical Performance of Ni-Rich Layered Oxide Cathodes by Combination of the Gradient Doping and Dual-Conductive Layers Coating?

Author

Qiwen Ran; Hongyuan Zhao; Xiaohui Shu; Youzuo Hu; Shuai Hao; Qianqian Shen; Wei Liu; Jintao Liu; Meiling Zhang; Hao Li; Xingquan Liu

Publisher

American Chemical Society (ACS)

Published

2019

Language

EN

Field

Engineering (Physical Sciences)