BROWSE

Related Scientist

Researcher

나노입자 연구단
나노입자 연구단
more info

Facile Synthesis of Nb2O5@Carbon Core-Shell Nanocrystals with Controlled Crystalline Structure for High-Power Anodes in Hybrid Supercapacitors Highly Cited Paper

Cited 115 time in webofscience Cited 0 time in scopus
289 Viewed 31 Downloaded
Title
Facile Synthesis of Nb2O5@Carbon Core-Shell Nanocrystals with Controlled Crystalline Structure for High-Power Anodes in Hybrid Supercapacitors
Author(s)
Lim E.; Jo C.; Kim H.; Kim M.-H.; Mun Y.; Chun J.; Ye Y.; Hwang J.; Ha K.-S.; Kwang Chul Roh; Kisuk Kang; Yoon S.; Lee J.
Publication Date
2015-07
Journal
ACS NANO, v.9, no.7, pp.7497 - 7505
Publisher
AMER CHEMICAL SOC
Abstract
Hybrid supercapacitors (battery-supercapacitor hybrid devices, HSCs) deliver high energy within seconds (excellent rate capability) with stable cyclability. One of the key limitations in developing high-performance HSCs is imbalance in power capability between the sluggish Faradaic lithium-intercalation anode and rapid non-Faradaic capacitive cathode. To solve this problem, we synthesize Nb2O5@carbon core-shell nanocyrstals (Nb2O5@C NCs) as high-power anode materials with controlled crystalline phases (orthorhombic (T) and pseudohexagonal (TT)) via a facile one-pot synthesis method based on a water-in-oil microemulsion system. The synthesis of ideal T-Nb2O5 for fast Li+ diffusion is simply achieved by controlling the microemulsion parameter (e.g., pH control). The T-Nb2O5@C NCs shows a reversible specific capacity of ∼180 mA h g-1 at 0.05 A g-1 (1.1-3.0 V vs Li/Li+) with rapid rate capability compared to that of TT-Nb2O5@C and carbon shell-free Nb2O5 NCs, mainly due to synergistic effects of (i) the structural merit of T-Nb2O5 and (ii) the conductive carbon shell for high electron mobility. The highest energy (∼63 W h kg-1) and power (16528 W kg-1 achieved at ∼5 W h kg-1) densities within the voltage range of 1.0-3.5 V of the HSC using T-Nb2O5@C anode and MSP-20 cathode are remarkable. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2340
ISSN
1936-0851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
facile synthesis.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse