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1D nanobar-like LiNi0.4Co0.2Mn0.4O2 as a stable cathode material for lithium-ion batteries with superior long-term capacity retention and high rate capability
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Chen, Zhen, Chao, Dongliang, Liu, Jilei, Copley, Mark, Lin, Jianyi, Shen, Zexiang, Kim, Guk-Tae and Passerini, Stefano (2017) 1D nanobar-like LiNi0.4Co0.2Mn0.4O2 as a stable cathode material for lithium-ion batteries with superior long-term capacity retention and high rate capability. Journal of Materials Chemistry A, 5 (30). pp. 15669-15675. doi:10.1039/c7ta02888a ISSN 2050-7488.
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Official URL: http://dx.doi.org/10.1039/c7ta02888a
Abstract
In this work is reported the successful synthesis of 1D nanobar-like LiNi0.4Co0.2Mn0.4O2 (N-NCM), preferentially exposing the {010} electrochemically active facets. The material is obtained via a precipitation process followed by a calcination step. Upon calcination at 800 °C, the material delivers a high initial reversible capacity of 177.1 mA h g−1 at 0.1C, while at higher current densities (1C, 2C, 5C and 10C), it still delivers 152.8, 141.7, 122.7 and 104.2 mA h g−1, respectively. After 100 cycles, the material exhibits high capacity retention values, ca. 91% (0.1C) and 94% (10C). The good electrochemical performance is attributed to the synthesis design strategy leading to 1D nanobars with exposed {010} electrochemically active facets, which provide a more open structure for unimpeded Li+ migration. In addition, the diffusion pathway of lithium ions is greatly reduced because of the nano-sized bar shape. All these factors play a decisive role in achieving significantly enhanced lithium ion diffusivity, and thus superior high C-rate capability and greatly improved long-term cycling stability.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Journal or Publication Title: | Journal of Materials Chemistry A | ||||||||
Publisher: | R S C Publications | ||||||||
ISSN: | 2050-7488 | ||||||||
Official Date: | 5 July 2017 | ||||||||
Dates: |
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Volume: | 5 | ||||||||
Number: | 30 | ||||||||
Page Range: | pp. 15669-15675 | ||||||||
DOI: | 10.1039/c7ta02888a | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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