Currently, organic electrode materials have shown promising prospects in lithium-ion batteries (LIBs). However, the practical application of organic electrode materials is severely hindered by the intrinsic low electrical conductivity and poor cycle stability. Herein, we present a novel polyimide (NBI-PI) which contains extended π-conjugated naphthalene ring and Schiff-base structure as an anode material. The NBI-PI has abundant active sites and crystallized nature. The organic anode based on NBI-PI for LIBs exhibit good reversible capacity of 627.8 mA h g⁻¹ at 0.25 A g⁻¹ after 200 cycles, and display reasonable rate performance of 217 mA h g⁻¹ at 2 A g⁻¹. When the batteries are cycled at 2 A g⁻¹, capacity retention of 85.7% is attained after 1600 electrochemical cycles. This work demonstrates a facile and practical strategy to develop high-performance organic anode materials for lithium-ion batteries.

当前，有机电极材料在锂离子电池（LIB）中显示出令人鼓舞的前景。然而，固有的低电导率和较差的循环稳定性严重地阻碍了有机电极材料的实际应用。在这里，我们提出了一种新型的聚酰亚胺（NBI-PI），其中含有扩展的π共轭萘环和席夫碱结构作为阳极材料。NBI-PI具有丰富的活性位点和结晶性质。200次循环后，基于NBI-PI的LIB有机阳极在0.25 A g ^-1下表现出627.8 mA h g ^-1的良好可逆容量，在2 A g ^-1下显示出217 mA h g ^-1的合理速率性能。当电池以2 A g ^-1循环时1600次电化学循环后，容量保持率为85.7％。这项工作证明了开发用于锂离子电池的高性能有机阳极材料的简便实用的策略。