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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/15369

Title: A stable lithium-rich surface structure for lithium-rich layered cathode materials
Authors: Kim, Sangryun
Cho, Woosuk
Zhang, Xiaobin
Oshima, Yoshifumi
Choi, Jang Wook
Keywords: Lithium ion battery
Li-rich layered oxide cathode
Issue Date: 2016-11-25
Publisher: Springer Nature
Magazine name: Nature Communications
Volume: 7
Start page: Article number: 13598
DOI: 10.1038/ncomms13598
Abstract: Lithium ion batteries are encountering ever-growing demand for further increases in energy density. Li-rich layered oxides are considered a feasible solution to meet this demand because their specific capacities often surpass 200 mAh g^<−1> due to the additional lithium occupation in the transition metal layers. However, this lithium arrangement, in turn, triggers cation mixing with the transition metals, causing phase transitions during cycling and loss of reversible capacity. Here we report a Li-rich layered surface bearing a consistent framework with the host, in which nickel is regularly arranged between the transition metal layers. This surface structure mitigates unwanted phase transitions, improving the cycling stability. This surface modification enables a reversible capacity of 218.3 mAh g^<−1> at 1C (250 mA g^<−1>) with improved cycle retention (94.1% after 100 cycles). The present surface design can be applied to various battery electrodes that suffer from structural degradations propagating from the surface.
Rights: Copyright (C) 2016 Authors. Sangryun Kim, Woosuk Cho, Xiaobin Zhang, Yoshifumi Oshima & Jang Wook Choi, Nature Communications, 7, 2016, Article number: 13598. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/10119/15369
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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