Reduced Graphene Oxide/LiMgPO4 Double Layer-Coated Li-Rich 0.4Li2MnO3·0.6LiMn1/3Ni1/3Co1/3O2 for High Performance Cathode
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Lithium-rich layered oxides (LLOs) have emerged as highly promising cathode materials for lithium-ion batteries due to their high specific capacity and cost-effectiveness. However, structural changes, oxygen release, and transition metal dissolution during cycling lead to irreversible voltage decay and capacity degradation, posing significant challenges for their practical application. While surface coatings with metal oxides offer partial mitigation, their poor electronic conductivity compromises rate capability and cycle stability. To tackle this challenge, we introduce an innovative dual-layer coating strategy by sequentially coating LLO (Li 1.2 Mn 0.6 Ni 0.2 Co 0.2 O 2 ) particles with an ion-conductive LiMgPO 4 (LMP) inner layer and a conductive reduced graphene oxide (rGO) outer layer. The LMP layer mitigates electrolyte-induced side reactions, while the rGO layer enhances electron transport, synergistically improving the performance. This synergistic design enables the optimized LLO@LMP@rGO cathode to achieve 80% capacity retention after 200 cycles at 1 C (vs 31% for pristine LLO) and an impressive high-rate capacity of 145 mA h g –1 at 8 C. The straightforward fabrication process, involving coprecipitation and thermal reduction, underscores its scalability for industrial production. Our work not only offers a viable pathway to enhance LLO cathodes but also inspires interfacial engineering strategies for advanced battery systems.
Source: ACS Omega
Authors: Fengying Wang, Wanxi Wang
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Awards: G2870852333, G4726240873
OpenAlex ID: W4409048668