Boosting Initial Coulombic Efficiency in Li‐Rich Mn‐based Cathodes by Tuning Orbital Hybridization

Abstract Li‐rich manganese‐based oxides (LRMO) are promising cathode materials for next‐generation lithium‐ion batteries due to their high‐capacity and low‐cost merits. However, the low initial coulombic efficiency (ICE) and irreversible oxygen release of LRMO severely hinder their commercialization processes. Here, we employ glyoxal treatment to modulate the hybridization between transition metal (TM) 3 d and oxygen (O) 2 p orbitals in LRMO. This approach is found to reduce the Co/Mn t 2g ‐O 2 p hybridization in LRMO while simultaneously activating the Co 2+ /Co 3+ redox below the Fermi level. Our findings demonstrate that tuning TM 3 d ‐O 2 p orbital hybridization can be a viable approach to improve the ICE of LMRO. Specifically, the ICE of LRMO can be elevated from 85.3% to 102.5%, and a high specific capacity of 291.2 mAh g −1 can be achieved at 0.1 C. Moreover, the treated LRMO cathodes exhibit significantly enhanced capacity retention.

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Publication Details

Journal
Angewandte Chemie
Published
2025-05-06
DOI
https://doi.org/10.1002/ange.202501777
Primary Topic
Advancements in Battery Materials
Type
article
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article

Boosting Initial Coulombic Efficiency in Li‐Rich Mn‐based Cathodes by Tuning Orbital Hybridization

Yinguo Xiao, Mihai Chu, Junrong Zhang, Ze He et al.
Angewandte Chemie
Advancements in Battery Materials
article

Boosting Initial Coulombic Efficiency in Li‐Rich Mn‐based Cathodes by Tuning Orbital Hybridization

Yinguo Xiao, Mihai Chu, Junrong Zhang, Ze He, Jinqi Li, Tao Zeng, Lunhua He, Maolin Yang, Wei Tang, Guojie Chen, Zhongyuan Huang, Yuguang Pu, Rui Wang, Limin Wang, Ziwei Chen, Zheng Jiao, Wenguang Zhao, Xiaohu Wang, Xiaoyu Gao
article en

Abstract

Abstract Li‐rich manganese‐based oxides (LRMO) are promising cathode materials for next‐generation lithium‐ion batteries due to their high‐capacity and low‐cost merits. However, the low initial coulombic efficiency (ICE) and irreversible oxygen release of LRMO severely hinder their commercialization processes. Here, we employ glyoxal treatment to modulate the hybridization between transition metal (TM) 3 d and oxygen (O) 2 p orbitals in LRMO. This approach is found to reduce the Co/Mn t 2g ‐O 2 p hybridization in LRMO while simultaneously activating the Co 2+ /Co 3+ redox below the Fermi level. Our findings demonstrate that tuning TM 3 d ‐O 2 p orbital hybridization can be a viable approach to improve the ICE of LMRO. Specifically, the ICE of LRMO can be elevated from 85.3% to 102.5%, and a high specific capacity of 291.2 mAh g −1 can be achieved at 0.1 C. Moreover, the treated LRMO cathodes exhibit significantly enhanced capacity retention.

Angewandte ChemieVol. 137(28)
King University (US), Sun Yat-sen University (CN), Peking University (CN), University of Cambridge (GB), China Spallation Neutron Source (CN), Peking University Shenzhen Hospital (CN), Politecnico di Milano (IT)
Openalex Percentile: Top 92%
Advancements in Battery Materials
DOISourceOpenAlex
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