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Flexible quasi-solid-state lithium-ion capacitors employing amorphous SiO2 nanospheres encapsulated in nitrogen-doped carbon shell as a high energy anode

Title
Flexible quasi-solid-state lithium-ion capacitors employing amorphous SiO2 nanospheres encapsulated in nitrogen-doped carbon shell as a high energy anode
Authors
Thangavel, RanjithVignesh, AhilanMoorthy, MegalaYoon, Won-SubShanmugam, SangarajuLee, Yun-Sung
DGIST Authors
Shanmugam, Sangaraju
Issue Date
2021-02
Citation
Journal of Power Sources, 484, 229143
Type
Article
Article Type
Article
Author Keywords
High capacity anodeLithium-ion capacitorSiO2Core-shellFlexible device
Keywords
BATTERY ANODESHIGH-POWERAEROGEL COMPOSITESOXIDE HYBRIDDENSITYNANOTUBESTORAGEELECTROCATALYSTNANOPARTICLESSTABILITY
ISSN
0378-7753
Abstract
Lithium-ion hybrid capacitors (LICs) take the advantage of simultaneous high energy – power output, and become increasingly important for next generation applications. Developing a high performing LICs with high energy-power-cycle combination remains a significant challenge due to low capacity intercalation electrodes, and kinetically sluggish alloying type electrodes. A strategy employing fast pseudocapacitive lithium ion storage in high-capacity alloying type anode, rather than a bulk storage, can output kinetically superior LICs with high energy even at high power conditions. Herein, we demonstrate a highly interconnected 3-dimensional (3D) SiO2 nanospheres embedded Nitrogen-doped carbon shell with fast lithium ion storage kinetics as high performing anode for LICs. As a result, LIC with a high energy (139 Wh kg−1), high power density (42 kW kg−1), and super stability (20,000 cycles) is obtained, outperforming previously studied alloying type metal oxide and sulfide anodes. A flexible LICs is further demonstrated which shows good stability under different bending conditions. The current research promotes the practical utilization of earth-abundant material as a high capacity and high rate electrode for the next-generation flexible and wearable devices. © 2020
URI
http://hdl.handle.net/20.500.11750/12678
DOI
10.1016/j.jpowsour.2020.229143
Publisher
Elsevier BV
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
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Collection:
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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