用于可持续高能量下一代电池的零应变富锰层状阴极

IF 60.1 1区 材料科学 Q1 ENERGY & FUELS
Geon-Tae Park, Nam-Yung Park, Ji-Hyun Ryu, Sung-June Sohn, Tae-Yeon Yu, Myoung-Chan Kim, Sourav Baiju, Payam Kaghazchi, Chong S. Yoon, Yang-Kook Sun
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引用次数: 0

摘要

个人交通工具电气化对高能锂离子电池的需求不断增加,可能导致全球原材料(Co和Ni)供应的不确定性。本文提出了一种新颖的富锰组合物,它具有准有序结构,具有以前未观察到的两个混合阳离子有序序列。部分有序结构在高截止电压下稳定了电解阴极,提供了无应变特性,沿a轴和c轴的结构变化限制在约1%。因此,阴极可以在4.6 V下工作,同时提供与富镍Li(Ni0.8Co0.1Mn0.1)O2相当的可逆容量。此外,在全电池长期高压循环中保持高容量,具有优异的热安全性。以准有序晶体结构为特征的高性能富锰层状阴极可以潜在地缓解电池行业对镍的需求不断增长所带来的供应不确定性,以及从镍矿石中提取镍所带来的环境问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Zero-strain Mn-rich layered cathode for sustainable and high-energy next-generation batteries

Zero-strain Mn-rich layered cathode for sustainable and high-energy next-generation batteries

The increasing demand for high-energy Li-ion batteries for the electrification of personal transportation may lead to uncertainty in the global supply of raw materials (Co and Ni). Here we propose a novel Mn-rich composition, which has a quasi-ordered structure with previously unobserved two intermixed cation-ordering sequences. The partially ordered structure stabilizes the delithiated cathode at a high cut-off voltage, offering strain-free characteristics, with structural variations along both the a and c axes limited to approximately 1%. Consequently, the cathode can operate at 4.6 V while delivering a reversible capacity comparable to that of Ni-rich Li(Ni0.8Co0.1Mn0.1)O2. Moreover, a high capacity is maintained during long-term and high-voltage cycling in full cells with exceptional thermal safety. The high-performance Mn-rich layered cathodes characterized by quasi-ordered crystal structure can potentially relieve supply uncertainty resulting from the rising demand for Ni in the battery industry and environmental concerns associated with the extraction of Ni from its ores.

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来源期刊
Nature Energy
Nature Energy Energy-Energy Engineering and Power Technology
CiteScore
75.10
自引率
1.10%
发文量
193
期刊介绍: Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.
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