▎ 摘　　要

Sodium ion batteries (SIBs) have been considered as a candidate for lithium ion batteries (LIBs) due to the low cost of sodium and similar construction principle with LIBs. However, its widespread application was limited due to the lack of an anode with satisfactory energy density. In this work, a Bi-based ternary material (MnBi4S7) and its graphene composite (MnBi4S7/G) become a new member of SIB's anode. The specific capacity of MnBi4S7/G was higher to similar to 480 mAh g(-1), corresponding to a volume specific capacity of similar to 1800 mAh cm(-3). Compare to most of recently reported novel ternary anode materials, MnBi4S7/G showed higher volume specific capacity. (C) 2021 Elsevier B.V. All rights reserved.