Page 93 - Read Online

Page 24 of 64 Rehman et al. Energy Mater 2024;4:400068 https://dx.doi.org/10.20517/energymater.2024.06

Figure 11. (A) In-situ XRD patterns of Sb Se /rGO SIB anode during first cycle (de)sodiation; (B) XRD patterns within a selected 2θ
2
3
range during the first cycle against voltage; (C) Stepwise description of the reaction mechanism of the Sb Se /rGO hybrid during the
3
2
(dis)charge process. Reproduced with permission from [139] . Copyright © 2017 John Wiley & Sons, Inc.
Hu et al. have also reported a composite derived from Sb Se @rGO with a highly commendable
2
3
performance as an SIB anode . The composite delivered a stable capacity of 260 mAh g at a high ampere
-1
[144]
density of 20 A g . The rGO alleviated volume stresses with reduced particle agglomeration during repeated
-1
(de) sodiation cycles. Similarly, Chong et al. have presented an N-doped C-rGO composite of Sb Se
2
3
[145]
2
(Sb Se @rGO@NC) that bears Sp -N . This composite can sustain the Sb Se volume stresses. The C-N-Sb
2
3
2
3
bond formation has been proposed to be developed in-situ after initial discharging. These bonding
interactions of Sp -N have a high affinity for Na , ensuring a high reversible capacity. Besides suitable
+
2
capacity retention (288.5 mAh g over 100 cycles at 0.02 A g ), the composite SIB anode has an extended
-1
-1
life of over 1,000 cycles with a small capacity drop of 0.18 mAh g per cycle.
-1
A novel combination of Ti C T sheets and Sb S nanowires has been recently reported . The composite
[146]
3
2 3
2 x
successfully aggravated most of the shortcomings of individual materials symbiotically. On the other hand,
the low conductivity, volume stresses, polyselenide shuttling, and slow sodiation kinetics of Sb Se have been
2
3
bothered by MXenes. As a result, the sheet agglomeration issue of MXenes is delimited by the Sb Se . The
3
2
-1
-1
anode can deliver a capacity of 568.9 mAh g at 0.1 A g after 100 cycles. Even after an extended life span of
-1
500 cycles, a superior capacity (304.1 mAh g ) at a high current of 1 A g was attained.
-1