Details

Autor(en) / Beteiligte

• Wang, Li-Ping
• Li, Nian-Wu
• Wang, Tai-Shan
• Yin, Ya-Xia
• Guo, Yu-Guo
• Wang, Chun-Ru

Titel

Conductive graphite fiber as a stable host for zinc metal anodes

Ist Teil von

• Electrochimica acta, 2017-08, Vol.244, p.172-177

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Using graphite fiber as a skeleton for zinc metal anodes in hybrid aqueous batteries.•After 350 cycles at 1C, a relatively low voltage hysteresis (below 50mV) of Zn@GF has been achieved.•The growth of dendritic Zn has been significantly retarded. Zn metal with high theoretical capacity (820mAhg−1), environmental-friendly properties and low cost is very competitive to be as an anode for aqueous batteries. However, uncontrollable growth of dendritic zinc in these batteries during plating/stripping process of zinc ions not only leads to a low Coulombic efficiency but also brings safety hazards, which have obstructed the application of secondary Zn-based batteries. Here we use high conductive carbon fiber-graphite felt (GF) as collector and electrodeposit zinc under constant voltage to fabricate a self-supported Zn@GF negative electrode. The graphite felt provides this anode larger electroactive area to transport electrons faster and loads zinc in a more event way, thus preluding the zinc plating in several specific directions. This composite anode offers an efficient solution to get a dendrite-free cycling behavior of zinc-based batteries and might be promising in advanced aqueous batteries for large-scale energy storage.