尖晶石
锂(药物)
氧气
离子
阴极
电极
氧化物
电池(电)
化学
材料科学
纳米技术
物理化学
物理
热力学
医学
功率(物理)
有机化学
冶金
内分泌学
作者
Gemeng Liang,Emilia Olsson,Jinshuo Zou,Zhibin Wu,Jingxi Li,Cheng‐Zhang Lu,Anita M. D’Angelo,Bernt Johannessen,Lars Thomsen,Bruce C. C. Cowie,Vanessa K. Peterson,Qiong Cai,Wei Pang,Zaiping Guo
标识
DOI:10.1002/ange.202201969
摘要
Abstract Oxides composed of an oxygen framework and interstitial cations are promising cathode materials for lithium‐ion batteries. However, the instability of the oxygen framework under harsh operating conditions results in fast battery capacity decay, due to the weak orbital interactions between cations and oxygen (mainly 3 d –2 p interaction). Here, a robust and endurable oxygen framework is created by introducing strong 4 s –2 p orbital hybridization into the structure using LiNi 0.5 Mn 1.5 O 4 oxide as an example. The modified oxide delivers extraordinarily stable battery performance, achieving 71.4 % capacity retention after 2000 cycles at 1 C. This work shows that an orbital‐level understanding can be leveraged to engineer high structural stability of the anion oxygen framework of oxides. Moreover, the similarity of the oxygen lattice between oxide electrodes makes this approach extendable to other electrodes, with orbital‐focused engineering a new avenue for the fundamental modification of battery materials.
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