Jiang Fangqing, Wang Xiaolei, Fan Xiaoyun, Zhu Hui, Yin Jiao
College of Chemistry, Nanchang University, Nanchang 330031, China.
Guangdong Provincial Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China.
ACS Omega. 2021 Jan 15;6(4):2542-2548. doi: 10.1021/acsomega.0c04326. eCollection 2021 Feb 2.
Functionalization and morphological construction can promote lithium-ion storage performance of organic polymers. In this contribution, exceptional lithium ion storage performance is empowered to porous polyacrylonitrile (PAN) nanofibers via the integration of template-assisted electrospinning technology and thermal treatment. It is found that the atmosphere adopted during the annealing process controls the storage behaviors of Li. Impressively, the samples annealed in air present competitive capacities, rate capabilities, and a stable lifetime, compared with other counterparts (PAN powders and PAN fibers treated in N). Such enhancement in performance is attributed to the enriched oxygen-based functionalities (mainly C=O group) which guarantee a high specific capacity and the porous structure which facilitates the transportation of Li and electrons to improve the rate capability. It is envisioned that such morphology control and surface functionalization open up new horizons in the development of organic electrode materials with enhanced lithium-ion storage performances.
功能化和形态构建可以提升有机聚合物的锂离子存储性能。在本研究中，通过将模板辅助静电纺丝技术与热处理相结合，赋予了多孔聚丙烯腈（PAN）纳米纤维卓越的锂离子存储性能。研究发现，退火过程中采用的气氛控制着锂的存储行为。令人印象深刻的是，与其他样品（在氮气中处理的PAN粉末和PAN纤维）相比，在空气中退火的样品具有具有竞争力的容量、倍率性能和稳定的寿命。性能的这种提升归因于丰富的氧基官能团（主要是C=O基团），其保证了高比容量，以及多孔结构，该结构促进了锂和电子的传输，从而提高了倍率性能。可以预见，这种形态控制和表面功能化在开发具有增强锂离子存储性能的有机电极材料方面开辟了新的前景。
