Surface modification offers an alternative strategy to improve both ageing resistance and electrochemical performance of cathode materials for lithium-ion batteries. From the viewpoint of real application, surface modification of the cathode materials should be designed with scientificity, effectiveness, low cost, less Li⁺ leaching, and remained tap density. In this contribution, a selective adsorption-involved in-situ growth of polyaniline (PANI) nanoparticles on LiNi_0.5Mn_0.3Co_0.2O₂ (NMC532) has been designed through a room-temperature-and-pressure chemical vapor deposition technique. The selective growth of PANI on NMC532 is based on theoretical computation results that multivalent Ni, Mn, and Co are capable of specifically conjugating and activating aniline molecules and, hence, initiating in-situ oxidation polymerization. With only trace amount of aniline monomer, the resulting PANI nanoparticles-inlaid NMC532 microparticles can endure four-month ageing in ambient atmosphere and exhibit improved electrochemical performance at both room temperature and 55 °C, compared with pristine NMC532. The improved electrochemical performance of NMC532/PANI is attributed to the enhanced structural stability of NMC532 and inhibited side reactions related to Li₂CO₃ formation, PVDF degradation, electrolyte decomposition, and transition-metal dissolution, owing to PANI modification.

表面改性为提高耐老化性和锂离子电池正极材料的电化学性能提供了另一种策略。从实际应用的角度出发，应设计科学，有效，成本低，Li ⁺浸出少，并保持振实密度的阴极材料表面改性。在这一贡献中，聚苯胺（PANI）纳米粒子在LiNi _0.5 Mn _0.3 Co _0.2 O ₂上选择性吸附参与的原位生长（NMC532）是通过室温和常压化学气相沉积技术设计的。PANI在NMC532上的选择性生长基于理论计算结果，即多价Ni，Mn和Co能够特异性地共轭和活化苯胺分子，从而引发原位氧化聚合反应。与原始的NMC532相比，仅使用痕量的苯胺单体，所得的PANI纳米颗粒镶嵌NMC532微粒在环境大气中可以经受四个月的老化，并且在室温和55°C时均表现出改善的电化学性能。NMC532 / PANI电化学性能的提高归因于NMC532的增强的结构稳定性和与Li ₂ CO有关的副反应的抑制由于PANI的修饰，形成₃，PVDF降解，电解质分解和过渡金属溶解。