Dual‐Gradient Construction on Li‐Rich Cathodes for High Stability Lithium Battery

Tianhao Wu; Xu Zhang; Shiqi Liu; Zengqing Zhuo; Wanli Yang; Lingqiao Wu; Dongdong Xiao; Haijun Yu

doi:10.1002/adfm.202425669

journal article·2025-07Open access

Dual‐Gradient Construction on Li‐Rich Cathodes for High Stability Lithium Battery

Tianhao Wu, Xu Zhang, Shiqi Liu, Zengqing Zhuo, Wanli Yang, Lingqiao Wu, Dongdong Xiao, Haijun Yu

Advanced Functional Materials· Volume 35· Issue 30

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Source abstract

Abstract

Abstract The practical applications of high‐energy Li‐rich layered oxides (LLOs) have been hindered by the severe performance degradation including voltage decay and capacity fading. The gradient construction toward high‐activity interior and high‐stability exterior, typically realized by gradually changed transition metal (TM) gradient in LLOs, can alleviate the performance degradation to certain degrees. In this study, a gradient design of Al/Mg dopants is demonstrated for the TM‐gradient LLOs to further harmonize the high‐activity interior and high‐stability exterior, thereby forming the dual (TM and doping) gradient. As a result, superior capacity retention of 86% and a minor voltage decay of 0.54 mV cycle⁻¹ are achieved at 1 C after 300 cycles. The improved electrochemical stability of the dual‐gradient LLO is attributed to the enhanced surface stability and suppressed bulk structure degeneration of LLOs upon electrochemical cycling. The dual‐gradient design serves as an important approach to fabricate high‐performance bulk LLOs toward applications.

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Research context

Energy storage

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

Institute of Advanced Battery Materials and Devices College of Materials Science and Engineering Beijing University of Technology Beijing 100124 China

Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Beijing 100124 P. R. China

State Key Laboratory of Materials Low‐Carbon Recycling Beijing University of Technology Beijing 100124 China

Institute of Matter Science Beijing University of Technology Beijing 100124 China

Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA

Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality

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