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通过单晶层结构氧化物阴极材料实现高压和长寿命的电池

Dong-Run Yang¹, Liu Chen², Xuan-Wen Gao¹

¹Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning 110819, China.

|January 10, 2025

概括

单晶氧化物通过减少副作用和改善离子扩散来提高电池性能. 这一突破使得高压,持久的离子能量储存成为可能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

由于能量密度和可行性,基于的分层氧化物对电池具有前景.
颗粒边界和副作用限制了性能,尤其是在高电压下.

研究的目的:

设计和合成一个大尺寸的单晶正极材料,用于高压,长寿命的电池.
为了克服多晶材料在离子储能中的局限性.

主要方法:

合成O3类型的Na[Ni_0.3Mn_0.5Cu_0.1Ti_0.1]O₂作为大型单晶体.
在电池配置中材料的电化学表征.

主要成果:

单晶结构促进了更快的Na+扩散和更高的电子导电性.
(003) 平面增强了对副作用和结构退化的稳定性.
在一个完整的电池中,达到160.1 mAh g^{-1 (0.1 C) 和141.1 mAh g^{-1的特定容量.}}
经过2C的100个循环后,表现出极好的循环稳定性,保持97.3%.

结论:

单晶设计有效地抑制了基阴极的有害影响.
开发的材料显示了先进的高性能电池的巨大潜力.

关键词:

它是O3型的.阴极材料的材料是正极材料.高电压的高电压的高电压基于的氧化物.一个单晶的单晶.离子电池离子电池

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