Abstract
To improve the electrochemical performance of Co 3 O 4 /graphene composites towards high-performance lithium ion batteries, various facile chemical methods have been developed to form hybrid Co 3 O 4 /graphene composites, but the compositions of these composites were considerably different. In this study, a two-step solvothermal synthesis method was employed to accurately control the concentration of Co 3 O 4 nanoparticles (NPs) with particle sizes less than 10 nm in the composite. The Co 3 O 4 /reduced graphene oxide (RGO) composites exhibited the highest reversible capacity of 1600 mAh g −1 at 43 wt% Co 3 O 4 NPs. The synergic effects of the sub-10-nm sized Co 3 O 4 and the RGO sheets resulted in improved reversible capacity, cycling stability, and rate capability, which are caused by a large number of active sites and the short diffusion pathways provided by the nano-sized Co 3 O 4 , as well as the elastic buffer space and conductive pathway provided by the RGO sheets.
| Original language | English |
|---|---|
| Pages (from-to) | 15-21 |
| Number of pages | 7 |
| Journal | Chemical Engineering Journal |
| Volume | 309 |
| DOIs | |
| Publication status | Published - 2017 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering
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Sub-10-nm Co 3 O 4 nanoparticles/graphene composites as high-performance anodes for lithium storage . / Jang, Kyunghoon; Hwang, Deuk Kyu; Auxilia, Francis Malar; Jang, Jaewon; Song, Hayong; Oh, Byeong Yun; Kim, Yoongon; Nam, Junsik; Park, Ji Woong; Jeong, Sunho; Lee, Sun Sook; Choi, Sungho; Kim, In S.; Kim, Won Bae; Myoung, Jae Min; Ham, Moon Ho.
In: Chemical Engineering Journal, Vol. 309, 01.02.2017, p. 15-21.Research output: Contribution to journal › Article
TY - JOUR
T1 - Sub-10-nm Co 3 O 4 nanoparticles/graphene composites as high-performance anodes for lithium storage
AU - Jang, Kyunghoon
AU - Hwang, Deuk Kyu
AU - Auxilia, Francis Malar
AU - Jang, Jaewon
AU - Song, Hayong
AU - Oh, Byeong Yun
AU - Kim, Yoongon
AU - Nam, Junsik
AU - Park, Ji Woong
AU - Jeong, Sunho
AU - Lee, Sun Sook
AU - Choi, Sungho
AU - Kim, In S.
AU - Kim, Won Bae
AU - Myoung, Jae Min
AU - Ham, Moon Ho
PY - 2017/2/1
Y1 - 2017/2/1
N2 - To improve the electrochemical performance of Co 3 O 4 /graphene composites towards high-performance lithium ion batteries, various facile chemical methods have been developed to form hybrid Co 3 O 4 /graphene composites, but the compositions of these composites were considerably different. In this study, a two-step solvothermal synthesis method was employed to accurately control the concentration of Co 3 O 4 nanoparticles (NPs) with particle sizes less than 10 nm in the composite. The Co 3 O 4 /reduced graphene oxide (RGO) composites exhibited the highest reversible capacity of 1600 mAh g −1 at 43 wt% Co 3 O 4 NPs. The synergic effects of the sub-10-nm sized Co 3 O 4 and the RGO sheets resulted in improved reversible capacity, cycling stability, and rate capability, which are caused by a large number of active sites and the short diffusion pathways provided by the nano-sized Co 3 O 4 , as well as the elastic buffer space and conductive pathway provided by the RGO sheets.
AB - To improve the electrochemical performance of Co 3 O 4 /graphene composites towards high-performance lithium ion batteries, various facile chemical methods have been developed to form hybrid Co 3 O 4 /graphene composites, but the compositions of these composites were considerably different. In this study, a two-step solvothermal synthesis method was employed to accurately control the concentration of Co 3 O 4 nanoparticles (NPs) with particle sizes less than 10 nm in the composite. The Co 3 O 4 /reduced graphene oxide (RGO) composites exhibited the highest reversible capacity of 1600 mAh g −1 at 43 wt% Co 3 O 4 NPs. The synergic effects of the sub-10-nm sized Co 3 O 4 and the RGO sheets resulted in improved reversible capacity, cycling stability, and rate capability, which are caused by a large number of active sites and the short diffusion pathways provided by the nano-sized Co 3 O 4 , as well as the elastic buffer space and conductive pathway provided by the RGO sheets.
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UR - http://www.scopus.com/inward/citedby.url?scp=84991325543&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2016.10.009
DO - 10.1016/j.cej.2016.10.009
M3 - Article
VL - 309
SP - 15
EP - 21
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -