Introducing 4s–2p Orbital Hybridization to Stabilize Spinel Oxide Cathodes for Lithium-Ion Batteries

Autor: Gemeng Liang, Emilia Olsson, Jinshuo Zou, Zhibin Wu, Jingxi Li, Cheng‐Zhang Lu, Anita M. D'Angelo, Bernt Johannessen, Lars Thomsen, Bruce Cowie, Vanessa K. Peterson, Qiong Cai, Wei Kong Pang, Zaiping Guo
Přispěvatelé: ARCNL (WZI, IoP, FNWI)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Angewandte Chemie-International Edition, 61(27):e202201969. John Wiley and Sons Ltd
Angewandte Chemie, 134(27):e202201969. John Wiley and Sons Ltd
ISSN: 0044-8249
1433-7851
DOI: 10.1002/ange.202201969
Popis: 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 3d–2p interaction). Here, a robust and endurable oxygen framework is created by introducing strong 4s–2p orbital hybridization into the structure using LiNi0.5Mn1.5O4 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.
Databáze: OpenAIRE
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