journal article·2025-11-14

Selectively Coordinating Solid Polymer Electrolytes Enable Nonmodified 4.6 V-LiCoO 2 for High-Capacity and Long-Cycling Lithium Batteries

Lingfei Tang, Qiang Li, Xiaoxuan Liu, Yawen Xie, Liang Zhang, Yixiao Zhang, Qinfeng Zheng, Changqi Ma, Qi Chen, Liwei Chen

ACS Energy Letters· Volume 10· Issue 11
Publisher page

Abstract

LiCoO 2 (LCO) is often modified through surface coating, bulk doping, or a combination of both to inhibit its irreversible phase transitions over 4.6 V. However, modified LCO may have exacerbated interfacial impedance and/or reduced electrochemical activity, leading to a decreased discharge capacity in cells. Here, we develop a solid polymer electrolyte (SPE) with selective ion coordination to enable nonmodified 4.6 V-LCO for high-capacity and long-cycling lithium batteries. The tight coordination of copolymerized methylacrylonitrile to Co 3+ stabilizes nonmodified 4.6 V-LCO, whereas its unwanted binding to Li + is weakened by competition from substantial dissociated anions. As a result, the nonmodified 4.6 V-LCO|SPE|Li cell at 25 °C delivers not only a high initial discharge capacity of 199.32 mAh g –1 at 0.5 C and a capacity retention of 88% after 200 cycles but also decent rate performance. Our work establishes a promising selective coordination strategy for enabling high-voltage cathodes without the need of any modifications.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Nano-Tech and Nano-Bionics

University of Science and Technology of China

i-Lab, Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine, Suzhou Institute of Nano-Tech and Nano-Bionics

Chinese Academy of Sciences

Institute of Functional Nano & Soft Materials

Soochow University

School of Chemistry and Chemical Engineering, In situ Center for Physical Sciences, Shanghai Electrochemical Energy Device Research Center, and Frontiers Science Center for Transformative Molecules

Shanghai Jiao Tong University

Solid-State Battery Research Center, Global Institute of Future Technology

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Science and Technology Program of Suzhou · Chinese Academy of Sciences · Special Foundation for Carbon Peak Neutralization Technology Innovation Program of Jiangsu Province

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