TY - JOUR
T1 - Surface Polymerization and Controlled Pyrolysis
T2 - Tailorable Synthesis of Bumpy Hollow Carbon Spheres for Energy Storage
AU - Tao, Qianyi
AU - Zhu, Zhifeng
AU - Ye, Sunjie
AU - Lin, Gaojian
AU - Chen, Hui
AU - Tu, Yingfeng
AU - Bai, Guanghui
AU - Zhang, Lu
AU - Yang, Xiaoming
N1 - Publisher Copyright:
©
PY - 2021/4/6
Y1 - 2021/4/6
N2 - Architectural design of hollow carbon spheres (HCSs) plays a vital role in improving their performance and expanding applications. The tailorable synthesis of bumpy or asymmetric HCSs with a refined structure remains a challenge. Herein, bumpy HCSs (BHCSs) and bumpy concave HCSs (BCHCSs) have been engineered. The synthesis involves the formation of a core/shell precursor via the surface polymerization of pyrrole monomers on polystyrene nanoparticles, followed by the controlled pyrolysis process under different conditions. In comparison with HCSs, the concave hollow structure can reduce the excessive interior cavity and maintain prevalent merits of hollow structures; the bumpy shell can improve the surface area and number of active sites, thus improving the kinetics as energy storage devices. As a result, among BCHCSs, BHCSs, and HCSs, BCHCSs exhibit optimal electrochemical performance. The lithium-ion hybrid capacitors employing BCHCSs as an anode can deliver an energy density of 0.2182 kW h kg-1 at a power density of 0.2235 kW kg-1. Overall, this study provides an innovative design and strategy for constructing unique carbon nano-architectures for energy storage.
AB - Architectural design of hollow carbon spheres (HCSs) plays a vital role in improving their performance and expanding applications. The tailorable synthesis of bumpy or asymmetric HCSs with a refined structure remains a challenge. Herein, bumpy HCSs (BHCSs) and bumpy concave HCSs (BCHCSs) have been engineered. The synthesis involves the formation of a core/shell precursor via the surface polymerization of pyrrole monomers on polystyrene nanoparticles, followed by the controlled pyrolysis process under different conditions. In comparison with HCSs, the concave hollow structure can reduce the excessive interior cavity and maintain prevalent merits of hollow structures; the bumpy shell can improve the surface area and number of active sites, thus improving the kinetics as energy storage devices. As a result, among BCHCSs, BHCSs, and HCSs, BCHCSs exhibit optimal electrochemical performance. The lithium-ion hybrid capacitors employing BCHCSs as an anode can deliver an energy density of 0.2182 kW h kg-1 at a power density of 0.2235 kW kg-1. Overall, this study provides an innovative design and strategy for constructing unique carbon nano-architectures for energy storage.
UR - https://www.scopus.com/pages/publications/85103992594
U2 - 10.1021/acs.langmuir.1c00307
DO - 10.1021/acs.langmuir.1c00307
M3 - Article
C2 - 33750135
AN - SCOPUS:85103992594
SN - 0743-7463
VL - 37
SP - 4007
EP - 4015
JO - Langmuir
JF - Langmuir
IS - 13
ER -