Sep 2026· ACS Applied Materials and Interfaces· Vol 18, pp. 49286-49297· 0 citations· 60 references
Medicine
Abstract
Lithium cobalt oxide (LCO) cathode materials are widely used in 3C electronic products but suffer from rapid capacity fading at high voltages (>4.2 V). We propose a synergistic LiF/ZrO2 double-coating strategy to construct a flexible-rigid intimately intermingled nano-mosaic artificial interphase on Al-doped LiCoO2 (LCO-Al), significantly improving its cycling stability. Electrochemical tests show that the modified LCO-Al@LiF/ZrO2 has an initial discharge specific capacity of 205 mAh g-1 at 4.6 V and 0.5 C, much higher than 179 mAh g-1 of unmodified LCO (BLCO); after 100 cycles, its capacity retention reaches 81.9% (vs. 63.5% of BLCO). LCO-Al@LiF/ZrO2 also exhibits 97% capacity retention at 4.55 V. Mechanism analysis reveals that this strategy not only stabilizes the electrode-electrolyte interface and suppresses high-voltage phase transition but also enhances Li+ transport kinetics and reduces battery polarization, thus providing an effective approach for developing high-voltage LCO cathodes for high-energy-density lithium-ion batteries.
Extending the cycle life of LiCoO2 (LCO) cathodes under elevated cutoff voltages remains a critical challenge for lithium-ion batteries, as accelerated degradation is often governed by reaction heterogeneity and interfacial instability. Herein, we report a composite cathode composed of micron-sized LCO and nanoscale Li...
Jin-Yang Li, He Huang, Hao Guo et al.· Small· 0 citations
High-voltage all-solid-state batteries (ASSBs) promise high-energy-density storage, but oxidative instability of solid-state electrolytes at cathode interfaces remains a major obstacle. Here, we report a sacrificial-additive strategy for durable, high-voltage operation of low-cost Zr-based halide ASSBs. Introducing LiP...
Yan-Feng Zhang, Jin-Hua Liu, Ao Zeng et al.· Nano letters (Print)· 0 citations
High-power fast-charging lithium-ion batteries (LIBs) are indispensable energy sources for electric vehicles and consumer electronics. LiCoO2 (LCO) offers remarkable energy density and high voltage but suffers from structural degradation and irreversible O3/H1-3 phase transition at high voltage (e.g., 4.65 V), thus lim...
Jian Cui, Guan-Ming Yang, J. Gong et al.· Small· 0 citations
The high-voltage performance of sodium-ion batteries is strongly influenced by electrolyte chemistry, as parasitic reactions at the cathode interface can accelerate capacity loss. For layered oxide cathodes, the instability of the cathode-electrolyte interphase (CEI) becomes more severe at elevated voltages. Thus, opti...
The development of solid-state batteries with high safety and energy density is critical for next-generation storage. However, conventional halide electrolytes like Li2ZrCl6 suffer from low room-temperature ionic conductivity. We propose a synergistic Sm3+ and O2− co-doping strategy and synthesize a novel oxychloride L...
Si-Cheng Ou, Zhi-Peng Xia, Ke Wang et al.· RSC Advances· 0 citations
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