Zhao Changfeng, Liu Hanyang, Liu Jiawei, Shi Yanhong, Wang Shuguang, Tang Qiwei, Zhu Xiangbing, Zhang Huimin, Zhao Yan
School of Energy and Mechanical Engineering, Dezhou University DeZhou Shandong 253023 P. R. China
College of Agriculture, Shihezi University Shihezi Xinjiang 832003 P. R. China.
RSC Adv. 2023 Mar 15;13(13):8706-8717. doi: 10.1039/d3ra00032j. eCollection 2023 Mar 14.
Lithium-sulphur (Li-S) batteries are high-energy-density and cost-effective batteries. Herein, petal-like Ni Mn (OH) ( ≈ 0.04) nanosheets were synthesised using a hydrothermal method and the electrical conductivity of Ni(OH) was improved by applying the cathode functional materials in Li-S batteries. With up to 5 mg cm of S content in the cathode, the fabricated Ni Mn (OH) electrode exhibited specific discharge capacities up to 1375 and 1150 mA h g at 0.2 and 0.5C, and retained this capacity at 813 and 714 mA h g after 200 cycles, respectively. Electrochemical measurement results show that Ni Mn (OH) plays a critical role in Li-S batteries as it has a larger specific surface area than Ni(OH), which has superior adsorption performance toward lithium polysulphides. Moreover, the conductivity performance of Ni Mn (OH) is significantly better than that of Ni(OH), which improves the electrochemical reaction kinetics of the Li-S batteries.
锂硫（Li-S）电池是高能量密度且具有成本效益的电池。在此，采用水热法合成了花瓣状的NiMn(OH)(≈0.04)纳米片，并通过在锂硫电池中应用阴极功能材料提高了Ni(OH)的电导率。阴极中硫含量高达5mg/cm²时，制备的NiMn(OH)电极在0.2C和0.5C下的比放电容量分别高达1375和1150 mA h/g，在200次循环后分别保持在813和714 mA h/g。电化学测量结果表明，NiMn(OH)在锂硫电池中起着关键作用，因为它比Ni(OH)具有更大的比表面积，对多硫化锂具有优异的吸附性能。此外，NiMn(OH)的导电性能明显优于Ni(OH)，这改善了锂硫电池的电化学反应动力学。
