Volume 53

Reduce graphene oxide modified porous carbon foam as anode electrode for increased performance of a non-aqueous thermally regenerative battery Yichao An, Zhenchong Xiao, Liulin Que, Liang Zhang*, Jun Li, Xun Zhu, Qiang Liao

Abstract

Non-aqueous thermally regenerative batteries (NTRBs) hold significant potential for efficiently converting low-grade waste heat into electricity, offering broad application possibilities. Nevertheless, the specific surface area of the reported electrodes restricted both the electrochemical reaction rate and electricity generation. In this work, the reduced graphene oxide modified porous carbon foam(rGO/CF) was proposed to serve as an anode electrode for NTRB to promote the electricity generation of NTRB. The maximum power density of the NTRB with rGO/CF electrodes reached its peak at 190.2 W/m², showing enhancements of 15% compared to carbon foam. The enhanced performance was primarily attributed to the abundant active sites, large specific surface area, and favorable porous electrode structure. Moreover, the stability of the rGO/CF electrodes was confirmed with a continuous operation exceeding 270 minutes and enduring through more than 8 cycles. In conclusion, NTRB-rGO/CF showed great promise for applications in converting low-grade waste heat into electricity.

Keywords non-aqueous thermally regenerative battery, reduced graphene oxide, waste heat recovery, maximum power density