10.1021/acsami.6b13421.s001
Kongyao Chen
Kongyao
Chen
Wuxing Zhang
Wuxing
Zhang
Lihong Xue
Lihong
Xue
Weilun Chen
Weilun
Chen
Xinghua Xiang
Xinghua
Xiang
Min Wan
Min
Wan
Yunhui Huang
Yunhui
Huang
Mechanism
of Capacity Fade in Sodium Storage and the
Strategies of Improvement for FeS<sub>2</sub> Anode
American Chemical Society
2016
mA
FeS 2 Anode Pyrite FeS 2
structure collapse
capacity
sodium storage performance
graphene coating
anode material
sodium-ion batteries
FeS 2 electrode
approach exhibits
Sodium Storage
micron-sized sulfides
Capacity Fade
micron-sized FeS 2
sulfur dissolution
electrochemical performance
2016-12-23 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Mechanism_of_Capacity_Fade_in_Sodium_Storage_and_the_Strategies_of_Improvement_for_FeS_sub_2_sub_Anode/4524683
Pyrite
FeS<sub>2</sub> has attracted extensive interest as anode
material for sodium-ion batteries due to its high capacity, low cost,
and abundant resource. However, the micron-sized FeS<sub>2</sub> usually
suffers from poor cyclability, which stems from structure collapse,
exfoliation of active materials, and sulfur dissolution. Here, we
use a synergistic approach to enhance the sodium storage performance
of the micron-sized FeS<sub>2</sub> through voltage control (0.5–3
V), binder choice, and graphene coating. The FeS<sub>2</sub> electrode
with the synergistic approach exhibits high specific capacity (524
mA h g<sup>–1</sup>), long cycle life (87.8% capacity retention
after 800 cycles), and excellent rate capability (323 mA h g<sup>–1</sup> at 5 A g<sup>–1</sup>). The results prove that a synergistic
approach can be applied in the micron-sized sulfides to achieve high
electrochemical performance.