Tian Fanghua, Zhang Yanjun, Liu Li, Zhang Yin, Shi Qian, Zhao Qizhong, Cheng Yangqin, Zhou Chao, Yang Sen, Song Xiaoping
School of Physics, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
College of Chemistry, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, Xiangtan University, Xiangtan 411105, China.
Langmuir. 2020 Dec 15;36(49):15075-15081. doi: 10.1021/acs.langmuir.0c02625. Epub 2020 Dec 4.
Sodium-ion batteries (SIBs) have potential as an energy storage system because they have similar electrochemical properties as lithium-ion batteries, abundant resource reserves, and extremely high safety performance. Compared with traditional graphite materials, conductive polymers are more suitable as an anode electrode material for SIBs. In this study, a simple and scalable approach has been used to synthesize -toluenesulfonic acid-doped polypyrrole (p-TSA-PPy). The as-obtained material showed remarkable rate capacities and cyclability. At room temperature (25 °C), its discharge capacities could reach 185, 162, and 135 mAh g under 10, 30, and 50 C rates after 250 cycles, respectively. More importantly, the capacity of the p-TSA-PPy could still be maintained at 120.5 mAh g even at the 2000th cycle at 10 C. In addition, it achieves attractive electrochemical performance at different temperatures (0 and 50 °C).
钠离子电池（SIBs）作为一种储能系统具有潜力，因为它们具有与锂离子电池相似的电化学性质、丰富的资源储备以及极高的安全性能。与传统石墨材料相比，导电聚合物更适合作为钠离子电池的负极材料。在本研究中，采用了一种简单且可扩展的方法来合成对甲苯磺酸掺杂的聚吡咯（p-TSA-PPy）。所获得的材料表现出显著的倍率性能和循环稳定性。在室温（25°C）下，经过250次循环后，其在10C、30C和50C倍率下的放电容量分别可达185、162和135 mAh g。更重要的是，即使在10C倍率下循环至第2000次，p-TSA-PPy的容量仍可维持在120.5 mAh g。此外，它在不同温度（0和50°C）下也具有优异的电化学性能。
