BROWSE

Related Scientist

Researcher

나노입자 연구단
나노입자 연구단
more info

Pre-sodiated nickel cobaltite for high-performance sodium-ion capacitors

Cited 3 time in webofscience Cited 0 time in scopus
101 Viewed 5 Downloaded
Title
Pre-sodiated nickel cobaltite for high-performance sodium-ion capacitors
Author(s)
Yang D.; Sun X.; Lim K.; Ranganathan Gaddam R.; Ashok Kumar N.; Kisuk Kang; Zhao X.S.
Publication Date
2017-09
Journal
JOURNAL OF POWER SOURCES, v.362, no., pp.358 - 365
Publisher
ELSEVIER SCIENCE BV
Abstract
Sodium-ion capacitors (NICs) are a hybrid energy storage system that store energy via both charge adsorption at the cathode/electrolyte interface and charge intercalation in the bulk of the anode, thereby possessing a higher energy density than supercapacitors and a higher power density than batteries. In this work, nickel cobaltite (NiCo2O4) hollow spheres with a chestnut shell morphology have been solvothermally synthesized and tested in a sodium half-cell. The NiCo2O4 material exhibits a reversible capacity of 313 mAh g−1 at 1 A g−1. Pre-sodiation of NiCo2O4 is found to significantly improve its energy density. A NIC fabricated with pre-sodiated NiCo2O4 as the anode and an activated carbon (AC) as the cathode delivers an energy density of 60 Wh kg−1 at the power density of 10,000 W kg−1. Ex-situ X-ray diffraction (XRD) and transmission electron microscopy (TEM) results reveal that NiCo2O4 is converted to metallic nickel and cobalt and Na2O phases during the pre-sodiation. The metallic nickel and cobalt phases are kinetically favourable for the electrolyte diffusion and electrochemical reactions, thus significantly improving the performance of the pre-sodiated NiCo2O4 electrode. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4277
ISSN
0378-7753
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
Pre-sodiated nickel cobaltite for high-performance.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