Surface capacitive contributions: Towards high rate anode materials for sodium ion batteries
Author(s)
Li, Sheng
Qiu, Jingxia
Lai, Chao
Ling, Min
Zhao, Huijun
Zhang, Shanqing
Year published
2015
Metadata
Show full item recordAbstract
Due to the poor transportability of sodium ions, conventional sodium ion batteries (SIBs) cannot deliver sufficient capacity for high rate applications. Surface-induced capacitive processes (SCP) (e.g. capacitance and pseudocapacitance) could provide fast charge/discharge capacity in conjunction with the capacity provided by diffusion-controlled intercalation processes (DIP) to address this issue. For the first time, SCP was used to design a hierarchical layered graphene composite as an anode material for high rate SIBs. The contributions of the individual sodium storage processes were quantitatively evaluated, verifying the ...
View more >Due to the poor transportability of sodium ions, conventional sodium ion batteries (SIBs) cannot deliver sufficient capacity for high rate applications. Surface-induced capacitive processes (SCP) (e.g. capacitance and pseudocapacitance) could provide fast charge/discharge capacity in conjunction with the capacity provided by diffusion-controlled intercalation processes (DIP) to address this issue. For the first time, SCP was used to design a hierarchical layered graphene composite as an anode material for high rate SIBs. The contributions of the individual sodium storage processes were quantitatively evaluated, verifying the proposed mechanism. The resultant SCP-enhanced SIB delivers an outstanding rate capacity of 120 mAh/g at 10 A/g, which is among best of the state-of-the-art carbon-based SIBs. It also demonstrates exceptional cycling stability, retaining 83.5% capacity of 142 mAh/g at 0.5 A/g after 2500 cycles.
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View more >Due to the poor transportability of sodium ions, conventional sodium ion batteries (SIBs) cannot deliver sufficient capacity for high rate applications. Surface-induced capacitive processes (SCP) (e.g. capacitance and pseudocapacitance) could provide fast charge/discharge capacity in conjunction with the capacity provided by diffusion-controlled intercalation processes (DIP) to address this issue. For the first time, SCP was used to design a hierarchical layered graphene composite as an anode material for high rate SIBs. The contributions of the individual sodium storage processes were quantitatively evaluated, verifying the proposed mechanism. The resultant SCP-enhanced SIB delivers an outstanding rate capacity of 120 mAh/g at 10 A/g, which is among best of the state-of-the-art carbon-based SIBs. It also demonstrates exceptional cycling stability, retaining 83.5% capacity of 142 mAh/g at 0.5 A/g after 2500 cycles.
View less >
Journal Title
Nano Energy
Volume
12
Subject
Macromolecular and materials chemistry
Materials engineering
Materials engineering not elsewhere classified
Nanotechnology