TY - JOUR
T1 - Optimized assembling of MOF/SnO2/Graphene leads to superior anode for lithium ion batteries
AU - Gao, Chengwei
AU - Jiang, Z.J.
AU - Wang, P.X.
AU - Jensen, Lars Rosgaard
AU - Zhang, Y.F.
AU - Yue, Yuanzheng
PY - 2020
Y1 - 2020
N2 - SnO2 is one of the most promising anode materials for lithium ion batteries (LIBs). However, its cycling stability is poor due to its large volume change, and hence, its practical applications in LIBs are hindered. In this work, we propose a novel and simple strategy to enhance the performances of SnO2-based anodes. This strategy involves optimized assembling of SnO2 with metal organic framework (MOF) and graphene. SnO2 nanoparticles are packed into Al-MOF in an optimum mass ratio, and then the derived SnO2@MOF composite is wrapped by graphene, finally resulting in the SnO2@MOF/graphene composite. This composite exhibits greatly enhanced cycling stability, i.e., the specific capacity is about 450 mA h g−1 after 1000 charge/discharge cycles at the current density of 1000 mA g−1. This is attributed to the unique structural configuration of the composite, which gives rich accessible electroactive sites, shortened ion transport pathways, and superior electronic conductivity. The MOF protection layer is a key for improving the lithium storage of metal oxide-based anodes. Although the capacity of the SnO2@MOF/graphene composite is not the highest among the existing anode materials, its synthesis process is simpler and cost effective.
AB - SnO2 is one of the most promising anode materials for lithium ion batteries (LIBs). However, its cycling stability is poor due to its large volume change, and hence, its practical applications in LIBs are hindered. In this work, we propose a novel and simple strategy to enhance the performances of SnO2-based anodes. This strategy involves optimized assembling of SnO2 with metal organic framework (MOF) and graphene. SnO2 nanoparticles are packed into Al-MOF in an optimum mass ratio, and then the derived SnO2@MOF composite is wrapped by graphene, finally resulting in the SnO2@MOF/graphene composite. This composite exhibits greatly enhanced cycling stability, i.e., the specific capacity is about 450 mA h g−1 after 1000 charge/discharge cycles at the current density of 1000 mA g−1. This is attributed to the unique structural configuration of the composite, which gives rich accessible electroactive sites, shortened ion transport pathways, and superior electronic conductivity. The MOF protection layer is a key for improving the lithium storage of metal oxide-based anodes. Although the capacity of the SnO2@MOF/graphene composite is not the highest among the existing anode materials, its synthesis process is simpler and cost effective.
KW - Anode
KW - Composite
KW - Graphene
KW - Lithium ion batteries
KW - Metal organic framework
KW - Tin dioxide
UR - http://www.scopus.com/inward/record.url?scp=85084535841&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2020.104868
DO - 10.1016/j.nanoen.2020.104868
M3 - Journal article
SN - 2211-2855
VL - 74
JO - Nano Energy
JF - Nano Energy
M1 - 104868
ER -