TY - JOUR
T1 - Flexible high energy density zinc-ion batteries enabled by binder-free MnO2/reduced graphene oxide electrode
AU - Huang, Yuan
AU - Liu, Jiuwei
AU - Huang, Qiyao
AU - Zheng, Zijian
AU - Hiralal, Pritesh
AU - Zheng, Fulin
AU - Ozgit, Dilek
AU - Su, Sikai
AU - Chen, Shuming
AU - Tan, Ping Heng
AU - Zhang, Shengdong
AU - Zhou, Hang
N1 - Funding Information:
This work is supported by the China Postdoctoral Science Foundation funded project (2017M620517), the Shenzhen Science and Technology Innovation Committee (No. JCYJ20170818090257257, JCYJ20170412150411676 and JCYJ20160229122349365), and The Hong Kong Polytechnic University (1-YW0Z). Dr. Y. Huang acknowledges the financial support of the Zheng Hanming Visiting Scholar Award from International Teochew Doctors Association.
Publisher Copyright:
© 2018, The Author(s).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - We demonstrate a rechargeable zinc-ion battery with high energy density and cyclability using MnO2 and reduced graphene oxide (MnO2/rGO) electrode. The flexible and binder free electrode, with high MnO2 mass ratio (80 wt% of MnO2), is fabricated using vacuum filtration without any additional additives other than rGO. Compared to batteries with conventional MnO2 electrodes, the Zn–MnO2/rGO battery shows a significant enhanced capacity (332.2 mAh g-1 at 0.3 A g-1), improved rate capability (172.3 mAh g-1 at 6 A g-1) and cyclability. The capacity retention remains 96% after 500 charge/discharge cycles at 6 A g-1. The high MnO2 mass ratio makes MnO2/rGO electrode advantageous when the capacity is normalized to the whole electrode, particularly at high rates. The calculated gravimetric energy density of Zn–MnO2/rGO battery is 33.17 W h kg-1, which is comparable to the existing commercial lead-acid batteries (30–40 W h kg-1). Furthermore, the discharge profile and capacity of our Zn–MnO2/rGO battery shows no deterioration during bending test, indicating good flexibility. As a result, zinc-ion battery is believed to be a promising technology for powering next generation flexible electronics.
AB - We demonstrate a rechargeable zinc-ion battery with high energy density and cyclability using MnO2 and reduced graphene oxide (MnO2/rGO) electrode. The flexible and binder free electrode, with high MnO2 mass ratio (80 wt% of MnO2), is fabricated using vacuum filtration without any additional additives other than rGO. Compared to batteries with conventional MnO2 electrodes, the Zn–MnO2/rGO battery shows a significant enhanced capacity (332.2 mAh g-1 at 0.3 A g-1), improved rate capability (172.3 mAh g-1 at 6 A g-1) and cyclability. The capacity retention remains 96% after 500 charge/discharge cycles at 6 A g-1. The high MnO2 mass ratio makes MnO2/rGO electrode advantageous when the capacity is normalized to the whole electrode, particularly at high rates. The calculated gravimetric energy density of Zn–MnO2/rGO battery is 33.17 W h kg-1, which is comparable to the existing commercial lead-acid batteries (30–40 W h kg-1). Furthermore, the discharge profile and capacity of our Zn–MnO2/rGO battery shows no deterioration during bending test, indicating good flexibility. As a result, zinc-ion battery is believed to be a promising technology for powering next generation flexible electronics.
UR - https://www.scopus.com/pages/publications/85061687075
U2 - 10.1038/s41528-018-0034-0
DO - 10.1038/s41528-018-0034-0
M3 - Journal article
AN - SCOPUS:85061687075
SN - 2397-4621
VL - 2
JO - npj Flexible Electronics
JF - npj Flexible Electronics
IS - 1
M1 - 21
ER -