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Updated: May 5, 2026
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Constructing a Cr-Substituted Co-Free Li-Rich Ternary Cathode with a Spinel-Layered Biphase Interface
Lei Wu1, Zhi Li1, Jiarui Chen1
1National Base for International Science & Technology Cooperation of New Energy Equipment, Energy Storage Materials and Devices, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, Xiangtan 411100, Hunan, China.
This study introduces a novel chromium-containing, cobalt-free lithium-rich manganese-based layered oxide (LRMO) for enhanced battery performance. The new material demonstrates superior capacity, stability, and rate capability, overcoming key limitations of current LRMOs.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-rich manganese-based layered oxides (LRMOs) offer high capacity and voltage but suffer from poor cycling stability.
- Phase separation and transition metal (TM) migration are critical issues hindering LRMO commercialization.
Purpose of the Study:
- To develop a novel, cobalt-free LRMO material with improved electrochemical performance and stability.
- To investigate the role of chromium (Cr) doping in mitigating phase separation and enhancing structural integrity.
Main Methods:
- Synthesis of a Cr-containing Co-free LRMO (Li ypo{1.2}Mn ypo{0.54}Ni ypo{0.13}Cr ypo{0.13}O ypo{2}) with a spinel phase.
- Electrochemical characterization including charge-discharge cycling, rate capability tests, and Coulombic efficiency measurements.
Main Results:
- The Cr-doped LRMO exhibits an ultrahigh first discharge capacity of 310 mAh g ypo{-1} and an initial Coulombic efficiency of 92.09%.
- The material shows excellent cycling stability with 94.70% capacity retention after 100 cycles at 1C and minimal voltage decay.
- The introduction of Cr suppresses phase separation, prevents TM migration, and enhances Li ypo{+} diffusion.
Conclusions:
- The Cr-containing Co-free LRMO effectively addresses the phase separation issue in traditional LRMOs.
- The material demonstrates significant potential as a high-performance cathode for advanced lithium-ion batteries.
