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author:

Chang, Zhanying (Chang, Zhanying.) [1] | Zhang, Yiming (Zhang, Yiming.) [2] | He, Wei (He, Wei.) [3] | Wang, Jin (Wang, Jin.) [4] | Zheng, Hongfei (Zheng, Hongfei.) [5] | Qu, Baihua (Qu, Baihua.) [6] | Wang, Xinghui (Wang, Xinghui.) [7] | Xie, Qingshui (Xie, Qingshui.) [8] | Peng, Dong-Liang (Peng, Dong-Liang.) [9]

Indexed by:

EI

Abstract:

Li-rich layered oxides (LLOs) are supposed to be the most competitive cathode materials for lithium-ion batteries (LIBs), because of the high theoretical specific capacities (>250 mAh g-1). However, there are some inherent inferiorities, such as the low initial Coulombic efficiency (ICE) and the rapid capacity/voltage decay, that hinder the large-scale commercial applications of LLOs. Herein, we successfully obtained spinel-coated and phosphate-doped Co-free Li-rich layered oxides (Co-free LLOs) by cotreatment methods, using weakly acidic and alkalinity (NH4H2PO4solution), which could effectively improve the electrochemical performance. The spinel coating could not only accelerate the movement of Li+but also restrain O2release, while the doping PO43-could inhibit the transition-metal (TM) migration between the oxygen octahedral site and the oxygen tetrahedral site. The optimized Co-free LLOs cathode treated with 3% NH4H2PO4solution could deliver a high ICE of 88% and a high discharge capacity up to 159.5 mAh g-1after 500 cycles at 1C (1C = 250 mA g-1). Moreover, the voltage fading decreases from 0.64 mV to 0.32 mV per cycle during cycling. This work provides new insights for developing high-performance Co-free LLOs cathode materials. © 2022 American Chemical Society. All rights reserved.

Keyword:

Cathodes Lithium compounds Lithium-ion batteries Oxygen Transition metals

Community:

  • [ 1 ] [Chang, Zhanying]College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen; 361005, China
  • [ 2 ] [Zhang, Yiming]Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen; 361005, China
  • [ 3 ] [He, Wei]College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen; 361005, China
  • [ 4 ] [Wang, Jin]Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen; 361005, China
  • [ 5 ] [Zheng, Hongfei]College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen; 361005, China
  • [ 6 ] [Qu, Baihua]Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen; 361005, China
  • [ 7 ] [Qu, Baihua]Shenzhen Research Institute, Xiamen University, Shenzhen; 518000, China
  • [ 8 ] [Wang, Xinghui]College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou; 350108, China
  • [ 9 ] [Xie, Qingshui]College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen; 361005, China
  • [ 10 ] [Xie, Qingshui]Shenzhen Research Institute, Xiamen University, Shenzhen; 518000, China
  • [ 11 ] [Peng, Dong-Liang]College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen; 361005, China

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Source :

Industrial and Engineering Chemistry Research

ISSN: 0888-5885

Year: 2022

Issue: 22

Volume: 61

Page: 7464-7473

4 . 2

JCR@2022

3 . 8 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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