Element-tailored quenching methods: Phase-defective K0.5Mn1-xCrxO2 cathode materials for potassium ion batteries

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-08-23 DOI:10.1016/j.mtchem.2024.102251

Zhaomeng Liu, Shangzhuo Li, Jianjia Mu, Lu-Kang Zhao, Xuan-Wen Gao, Qinfen Gu, Xuan-Chen Wang, Hong Chen, Wen-Bin Luo

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Abstract

Potassium-ion batteries (PIBs) are emerging as a promising next-generation energy storage system due to their high economic efficiency and theoretical energy density. Among various cathode materials, KMnO-based cathode materials have garnered significant attention due to their high energy density and industrial feasibility. In this work, A P3-type KMnCrO cathode material was synthesized using a target-elements tailoring quenching method. By strategically substituting targeted elements and employing tailored quenching techniques, it can effectively alleviate Jahn-Teller distortion and suppress phase transitions, enhancing the material structural stability. The synthesized KMnCrO cathode material demonstrated excellent cycling stability of retaining 70 % specific capacity after 300 cycles at a current density of 500 mA g. This work breaks out the traditional solid-phase sintering preparation method and provides a new solution for the future preparation of other structurally stable high-performance layered oxides with excellent rate performance for potassium ion batteries.

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元素定制淬火方法：用于钾离子电池的相缺陷 K0.5Mn1-xCrxO2 阴极材料

钾离子电池（PIB）因其较高的经济效益和理论能量密度，正在成为一种前景广阔的下一代储能系统。在各种正极材料中，基于 KMnO 的正极材料因其高能量密度和工业可行性而备受关注。在这项工作中，采用靶元素定制淬火法合成了一种 P3 型 KMnCrO 阴极材料。通过策略性地替换目标元素并采用定制淬火技术，可有效缓解贾恩-泰勒畸变并抑制相变，提高材料结构的稳定性。该研究突破了传统的固相烧结制备方法，为今后制备其他结构稳定、速率性能优异的高性能层状氧化物提供了新的解决方案。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.