摘要
钠离子电池凭借成本低、安全性能高、低温性能好、循环寿命长等特点,被认为是一种有望替代锂离子电池用于大规模储能的二次电池.近十几年来,钠离子电池的各种正极材料得到广泛研究,其中P2和O3型层状金属氧化物正极材料体系被认为是最有潜力的正极材料体系.本文主要从化学组成、掺杂改性、结构优化等方面,评述了近五年来在改善该类材料容量、稳定性以及倍率性能的发展,并对层状正极材料在钠离子电池中的应用进行了展望.
Abstract
With low cost,high safety performance,good low-temperature performance and long cycle life,so-dium ion batteries are the next generation secondary batteries that are expected to replace lithium-ion batteries for the large-scale energy storage.In recent decades,various cathode materials for sodium-ion batteries have been ex-tensively studied,among which the P2 and O3 type layered metal oxides are the most promising cathode materials.In this review,developments in the last five years for improving the capacity,stability,and multiplicity performance of this class of materials are reviewed mainly in terms of chemical compositions,doping modifications,and structural optimizations.Moreover,an outlook on the applications of layered cathode materials in sodium-ion batteries is given.
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