固体核磁共振技术在锂/钠离子电池碳负极中的应用及研究进展

碳负极材料作为锂/钠离子电池的传统负极材料一直获得广泛的推广和应用，但其仍存在充电时间长、库伦效率低等问题，研究碳负极材料充放电机理是解决这些问题的关键.固体核磁共振（NMR）技术是一种研究固体材料中目标原子所处化学环境以及材料内部结构变化的有效手段.通过测定锂/钠离子电池中⁶Li、⁷Li和²³Na高速魔角旋转（MAS）条件下的固体NMR谱图，能够清晰获得锂/钠离子电池碳负极脱/嵌过程中的结构变化，以及碳原子与Li/Na的配位情况，从而为碳负极材料的设计及其电化学性能的提升提供充分的理论依据.本文综述了近年来固体NMR技术在锂/钠离子电池碳负极材料研究中的应用以及相关研究进展.

Progresses in Solid-State NMR Studies on Carbon Anode Materials for Lithium/Sodium-Ion Batteries

Carbon anode material is a traditional and widely-used anode material for lithium/sodium-ion batteries. However, it still has some drawbacks, such as long charging time and low columbic efficiency. Studying the charging and discharging mechanisms of the carbon anode material will help to solve these problems. Solid-state nuclear magnetic resonance (NMR) is an effective method to study the chemical environment of target atoms in solid materials and structural changes of materials. By measuring high speed magic-angle spinning (MAS) spectrum of ⁶Li, ⁷Li and ²³Na in lithium/sodium-ion batteries, the structural changes during the process of de-intercalation and coordination between the carbon atoms and Li/Na atoms can be elucidated. The information obtained can provide a sufficient theoretical basis for designing of novel carbon anode materials and improving their electrochemical properties. This paper reviews the application and progresses of solid-state NMR technology in the research of carbon anode materials for lithium/sodium-ion battery.