TY - JOUR
T1 - Cross-Coupled Macro-Mesoporous Carbon Network toward Record High Energy-Power Density Supercapacitor at 4 V
AU - Li, Jing
AU - Wang, Ning
AU - Tian, Jiarui
AU - Qian, Weizhong
AU - Chu, Wei
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (21506111, 21476145); The National project of 2016YFA0200102, and the Beijing key project of Z161100002116012. The authors also gratefully acknowledged the help from Dr. J. Deng, Z.Z. Ye, J. Wang, Z.F. Yang, and K. Chao.
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/12/19
Y1 - 2018/12/19
N2 - Ionic liquids (ILs) electrolyte hold tremendous potentials to develop high-energy-density electric double layer capacitor due to their wide voltage windows, but are severely plagued by the sluggish mass diffusion from high viscosity and large ion size, particularly over micropore-dominated carbon electrodes. Exploiting the carbon electrode possessing high compatibility with ILs electrolyte remains a great challenge. Herein, an emerging 3D cross-coupled macro-mesoporous carbon network with ultrahigh specific surface area (SSA, 2872.2 m2 g−1), N-self doping, small-sized mesopores (2–4 nm) and macropores (50–150 nm) is designed via a facile, versatile, and ecofriendly salt-template strategy from the NaNO3-gelatin biopolymer aerogel, which shows great adaptability toward high energy power density used in 4 V EMIBF4 ILs (92 Wh kg−1 is achieved at 1 kW kg−1, and notably a record high energy density of 39 Wh kg−1 is retained even at an ultrahigh power density of 200 kW kg−1). The large energy density is ascribed to the plentiful ion-available mesoporous active sites (Smeso/SSA = 86.6%, Vmeso/Vtotal = 92.1%), while the extraordinary power density is attributed to the synergistic effects from the suitable macro-mesoporous ion-diffusion channels, continuous conductive network, low oxygen content (2.24%) as well as good affinity to ILs.
AB - Ionic liquids (ILs) electrolyte hold tremendous potentials to develop high-energy-density electric double layer capacitor due to their wide voltage windows, but are severely plagued by the sluggish mass diffusion from high viscosity and large ion size, particularly over micropore-dominated carbon electrodes. Exploiting the carbon electrode possessing high compatibility with ILs electrolyte remains a great challenge. Herein, an emerging 3D cross-coupled macro-mesoporous carbon network with ultrahigh specific surface area (SSA, 2872.2 m2 g−1), N-self doping, small-sized mesopores (2–4 nm) and macropores (50–150 nm) is designed via a facile, versatile, and ecofriendly salt-template strategy from the NaNO3-gelatin biopolymer aerogel, which shows great adaptability toward high energy power density used in 4 V EMIBF4 ILs (92 Wh kg−1 is achieved at 1 kW kg−1, and notably a record high energy density of 39 Wh kg−1 is retained even at an ultrahigh power density of 200 kW kg−1). The large energy density is ascribed to the plentiful ion-available mesoporous active sites (Smeso/SSA = 86.6%, Vmeso/Vtotal = 92.1%), while the extraordinary power density is attributed to the synergistic effects from the suitable macro-mesoporous ion-diffusion channels, continuous conductive network, low oxygen content (2.24%) as well as good affinity to ILs.
KW - biopolymer aerogels
KW - ionic liquids
KW - macro-mesoporous carbons
KW - salt templates
KW - supercapacitors
UR - http://www.scopus.com/inward/record.url?scp=85055267489&partnerID=8YFLogxK
U2 - 10.1002/adfm.201806153
DO - 10.1002/adfm.201806153
M3 - Article
AN - SCOPUS:85055267489
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 51
M1 - 1806153
ER -