TY - JOUR
T1 - Gas expansion-assisted preparation of 3D porous carbon nanosheet for high-performance sodium ion hybrid capacitor
AU - Zhang, Litong
AU - Sun, Jingwen
AU - Zhao, Hongan
AU - Sun, Yuntong
AU - Dai, Liming
AU - Yao, Fanglei
AU - Fu, Yongsheng
AU - Zhu, Junwu
N1 - Funding Information:
This investigation was supported by the Natural Science Foundation of China (No. 51772152 , 21908110 ), the Natural Science Foundation of Jiangsu Province (No. 1192261031693 ), the Fundamental Research Funds for the Central Universities (No. 30919011110 , 1191030558 ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Sodium ion hybrid capacitors (SIHCs) have attracted considerable attentions due to their high-energy density of batteries and high-power output of supercapacitors. However, the slow intercalation kinetics of anode and low specific capacity of cathode greatly hinder the high-performance output of the SIHCs. Herein, we develop a facile chemical gas expansion method with chemical etching to prepare 3D nitrogen and sulfur co-doped porous carbon nanosheet (PCNS). As an anode material of SIBs, the PCNS displays a high reversible capacity of 205 mAh g−1 at 0.5 A g−1, outstanding rate capability of 96 mAh g−1 at 20 A g−1, and excellent cycle performance of 180 mAh g−1 at 7 A g−1 after 10 000 cycles. Based on this good performance, a dual-carbon SIHC is assembled by battery-type anode material (PCNS) and capacitive-type cathode material (hierarchically porous carbon). This device exhibits high energy densities of 119 Wh kg−1 and 53 Wh kg−1 at power densities of 200 W kg−1 and 20 kW kg−1, respectively. Besides, it possesses a superior cycle life of 82% capacity retention after 8000 cycles. Moreover, this work provides a new idea for the synthesis of carbon materials as high-performance SIBs and SIHCs electrode materials.
AB - Sodium ion hybrid capacitors (SIHCs) have attracted considerable attentions due to their high-energy density of batteries and high-power output of supercapacitors. However, the slow intercalation kinetics of anode and low specific capacity of cathode greatly hinder the high-performance output of the SIHCs. Herein, we develop a facile chemical gas expansion method with chemical etching to prepare 3D nitrogen and sulfur co-doped porous carbon nanosheet (PCNS). As an anode material of SIBs, the PCNS displays a high reversible capacity of 205 mAh g−1 at 0.5 A g−1, outstanding rate capability of 96 mAh g−1 at 20 A g−1, and excellent cycle performance of 180 mAh g−1 at 7 A g−1 after 10 000 cycles. Based on this good performance, a dual-carbon SIHC is assembled by battery-type anode material (PCNS) and capacitive-type cathode material (hierarchically porous carbon). This device exhibits high energy densities of 119 Wh kg−1 and 53 Wh kg−1 at power densities of 200 W kg−1 and 20 kW kg−1, respectively. Besides, it possesses a superior cycle life of 82% capacity retention after 8000 cycles. Moreover, this work provides a new idea for the synthesis of carbon materials as high-performance SIBs and SIHCs electrode materials.
KW - Carbon nanosheet
KW - Dual-carbon
KW - Gas expansion
KW - Hybrid capacitor
KW - Sodium ion storage
UR - http://www.scopus.com/inward/record.url?scp=85089157473&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2020.228679
DO - 10.1016/j.jpowsour.2020.228679
M3 - Article
AN - SCOPUS:85089157473
SN - 0378-7753
VL - 475
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 228679
ER -