“All‐In‐One” integrated ultrathin SnS2@3D multichannel carbon matrix power high‐areal–capacity lithium battery anode

• Published in: Carbon energy Vol. 1; no. 2; pp. 276 - 288
• Main Authors: Xu, Hongyi, Peng, Chengxin, Yan, Yuhua, Dong, Fei, Sun, Hao, Yang, Junhe, Zheng, Shiyou
• Format: Journal Article
• Language: English
• Published: Wiley 01.12.2019
• Subjects: 3D electrode; carbon matrix; high‐areal‐capacity; Li‐ion battery; metal sulfide
• ISSN: 2637-9368; 2637-9368
• DOI: 10.1002/cey2.22

Construction of a thickness‐independent electrode with high active material mass loading is crucial for the development of high energy rechargeable lithium battery. Herein, we fabricate an all‐in‐one integrated SnS2@3D multichannel carbon matrix (SnS2@3DMCM) electrode with in‐situ growth of ultrathin SnS2 nanosheets inside the inner walls of three dimensional (3D) multichannels. The interconnected conductive carbon matrix derived from natural wood acts as an integrated porous current collector to avail the electrons transport and accommodate massive SnS2 nanosheets, while plenty of 3D aligned multichannels facilitate fast ions transport with electrode thickness‐independent even under high mass loading. As expected, the integrated SnS2@3DMCM electrode exhibits remarkable electrochemical lithium storage performance, such as exceptional high‐areal‐capacity of 6.4 mAh cm−2, high rate capability of 3 mAh cm−2 under current of 6.8 mA cm−2 (10 C), and stable cycling performance of 6.8 mA cm−2 with a high mass loading of 7 mg cm−2. The 3D integrated porous electrode constructing conveniently with the natural source paves new avenues towards future high‐performance lithium batteries. We construct an “All‐In‐One” integrated electrode with multichannel three‐dimensional carbon matrix confined ultrathin SnS2 nanosheet attaching fast lithium‐ion kinetics even under high active material mass loading over 7 mg cm−2. The as‐prepared SnS2@ multichannel carbon matrix composite electrode can endure a 6.8 mA cm−2 current density, delivering a specific capacity of 3 mAh cm−2 (522 mAh g−1).