Revealing the Effect of Nickel Nanoparticles for Li Plating and Stripping Processes on Ni-Nx Doped Hollow Carbon Sphere

被引：0

作者：

Liu, Ting ^{[1
]}

Huang, Ying ^{[1
]}

Zhou, Shengqi ^{[1
]}

Wang, Runtong ^{[1
]}

Lei, Jie ^{[1
]}

Xu, Pan ^{[1
]}

Yuan, Ruming ^{[1
]}

Dong, Quanfeng ^{[1
]}

Chen, Jiajia ^{[1
]}

机构：

[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Dept Chem, Coll Chem & Chem Engn,Collaborat Innovat Ctr Chem, Xiamen 361005, Fujian, Peoples R China

来源：

CHEMELECTROCHEM | 2021年 / 8卷 / 20期

关键词：

Ni-N-x sites; nickel nanoparticles; lithium nucleation overpotential; exchange current density; lithium plating; stripping behaviour; LITHIUM; NANOSPHERES; NUCLEATION; STRATEGIES; GROWTH;

D O I：

10.1002/celc.202100822

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, the effects of the coexistence of Ni-N-x sites and Ni metal nanoparticles of Ni-N-C (nickel-nitrogen-carbon) materials on the thermodynamic Li nucleation overpotential (eta) and kinetic exchange current density (j(0)) are systematically studied. Ni-N-x sites guarantee reduced nucleation resistance on the hollow carbon sphere (HCS) host, while the low amount residual of Ni nanoparticles plays an adverse role. The Li nucleation overpotential was down to 10.6 mV and the exchange current density increased from 1.139 to 2.325 mA cm(-2) when the residual Ni nanoparticles in the prepared Ni-N-C composite were removed. As a result, pure Ni-N-x sites displayed an average CE of 98.4 % over 300 cycles and a stable Li plating/stripping behavior for over 800 h.

引用

页码：3832 / 3836

页数：5