High‐Capacity Cathode Material with High Voltage for Li‐Ion Batteries,Advanced Materials

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High‐Capacity Cathode Material with High Voltage for Li‐Ion Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-15 , DOI: 10.1002/adma.201705575
Ji-Lei Shi _{1,

2} , Dong-Dong Xiao ₃ , Mingyuan Ge ₄ , Xiqian Yu ₃ , Yong Chu ₄ , Xiaojing Huang ₄ , Xu-Dong Zhang _{1,

2} , Ya-Xia Yin _{1,

2} , Xiao-Qing Yang ₄ , Yu-Guo Guo _{1,

2} , Lin Gu ₃ , Li-Jun Wan ₁

Affiliation

Electrochemical energy storage devices with a high energy density are an important technology in modern society, especially for electric vehicles. The most effective approach to improve the energy density of batteries is to search for high‐capacity electrode materials. According to the concept of energy quality, a high‐voltage battery delivers a highly useful energy, thus providing a new insight to improve energy density. Based on this concept, a novel and successful strategy to increase the energy density and energy quality by increasing the discharge voltage of cathode materials and preserving high capacity is proposed. The proposal is realized in high‐capacity Li‐rich cathode materials. The average discharge voltage is increased from 3.5 to 3.8 V by increasing the nickel content and applying a simple after‐treatment, and the specific energy is improved from 912 to 1033 Wh kg⁻¹. The current work provides an insightful universal principle for developing, designing, and screening electrode materials for high energy density and energy quality.

中文翻译：

锂离子电池高压大容量正极材料

具有高能量密度的电化学能量存储设备是现代社会中的重要技术，尤其是对于电动汽车而言。提高电池能量密度的最有效方法是寻找高容量的电极材料。根据能量质量的概念，高压电池可提供非常有用的能量，从而为提高能量密度提供了新的见识。基于这一概念，提出了一种新颖而成功的策略，即通过增加阴极材料的放电电压并保持高容量来增加能量密度和能量质量。该建议是在高容量的富锂正极材料中实现的。通过增加镍含量并进行简单的后处理，平均放电电压从3.5 V增加到3.8 V，^-1。当前的工作为开发，设计和筛选具有高能量密度和能量质量的电极材料提供了有见地的普遍原则。

更新日期：2018-01-15

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