Ultrafast‐Loaded Nickel Sulfide on Vertical Graphene Enabled by Joule Heating for Enhanced Lithium Metal Batteries
Xinyi Shan, Jiaqi Zhu, Zhong Qiu, Ping Liu, Yu Zhong, Xueer Xu, Xinping He, Yongqi Zhang, Jiangping Tu, Yang Xia, Wang Chen, Wangjun Wan, Minghua Chen, Xinqi Liang, Xinhui Xia, Wenkui Zhang
Abstract
Abstract The design and fabrication of a lithiophilic skeleton are highly important for constructing advanced Li metal anodes. In this work, a new lithiophilic skeleton is reported by planting metal sulfides (e.g., Ni 3 S 2 ) on vertical graphene (VG) via a facile ultrafast Joule heating (UJH) method, which facilitates the homogeneous distribution of lithiophilic sites on carbon cloth (CC) supported VG substrate with firm bonding. Ni 3 S 2 nanoparticles are homogeneously anchored on the optimized skeleton as CC/VG@Ni 3 S 2 , which ensures high conductivity and uniform deposition of Li metal with non‐dendrites. By means of systematic electrochemical characterizations, the symmetric cells coupled with CC/VG@Ni 3 S 2 deliver a steady long‐term cycle within 14 mV overpotential for 1800 h (900 cycles) at 1 mA cm −2 and 1 mAh cm −2 . Meanwhile, the designed CC/VG@Ni 3 S 2 ‐Li||LFP full cell shows notable electrochemical performance with a capacity retention of 92.44% at 0.5 C after 500 cycles and exceptional rate performance. This novel synthesis strategy for metal sulfides on hierarchical carbon‐based materials sheds new light on the development of high‐performance lithium metal batteries (LMBs).