Abstract
Lithium-nickel-cobalt-manganese oxide, Li[NixCo yMnz]O2 (NCM) is a low-cost cathode material with a high capacity and a moderately high rate capability, however, it still suffers from poor electrochemical performance. In this study, several types of additives are attempted to enhance the surface stability of high-Ni-content (Ni ≥ 60%) cathodes and the most effective additive turns out to be PS. The cycle performance in the presence of 2% PS is much improved at a high temperature of 60 C: (1) 98.9% of its initial capacity is preserved, (2) the increase in thickness is only 17.9%, preventing undesired swellings, and (3) gases are not generated in large amounts with the internal pressure being 56.4 kPa. The FT-IR spectroscopy results suggest that the surface of the cathode in the presence of 2% PS is covered with a film of alkyl sulfone components (RSOSR and RSO 2SR), which is possibly formed by the electrochemical oxidation of PS. The current results confirm that the electrochemical performance of Ni-rich cathodes can be improved via the appropriate use of additives. They also indicate that among the tested additive candidates in this study, PS is highly desirable for enhancing the electrochemical performance of Ni-rich cathodes.
| Original language | English |
|---|---|
| Pages (from-to) | 48-54 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 253 |
| DOIs | |
| Publication status | Published - 2014 May 1 |
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Keywords
- 1,3-Propane sulfone
- Additive
- Cathode
- Lithium nickel cobalt manganese oxide
- Sulfone
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Physical and Theoretical Chemistry
Cite this
Effect of additives on electrochemical performance of lithium nickel cobalt manganese oxide at high temperature. / Kang, Kyoung Seok; Choi, Suneui; Song, Junho; Woo, Sang Gil; Jo, Yong Nam; Choi, Jungkyu; Yim, Taeeun; Yu, Ji Sang; Kim, Young Jun.
In: Journal of Power Sources, Vol. 253, 01.05.2014, p. 48-54.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of additives on electrochemical performance of lithium nickel cobalt manganese oxide at high temperature
AU - Kang, Kyoung Seok
AU - Choi, Suneui
AU - Song, Junho
AU - Woo, Sang Gil
AU - Jo, Yong Nam
AU - Choi, Jungkyu
AU - Yim, Taeeun
AU - Yu, Ji Sang
AU - Kim, Young Jun
PY - 2014/5/1
Y1 - 2014/5/1
N2 - Lithium-nickel-cobalt-manganese oxide, Li[NixCo yMnz]O2 (NCM) is a low-cost cathode material with a high capacity and a moderately high rate capability, however, it still suffers from poor electrochemical performance. In this study, several types of additives are attempted to enhance the surface stability of high-Ni-content (Ni ≥ 60%) cathodes and the most effective additive turns out to be PS. The cycle performance in the presence of 2% PS is much improved at a high temperature of 60 C: (1) 98.9% of its initial capacity is preserved, (2) the increase in thickness is only 17.9%, preventing undesired swellings, and (3) gases are not generated in large amounts with the internal pressure being 56.4 kPa. The FT-IR spectroscopy results suggest that the surface of the cathode in the presence of 2% PS is covered with a film of alkyl sulfone components (RSOSR and RSO 2SR), which is possibly formed by the electrochemical oxidation of PS. The current results confirm that the electrochemical performance of Ni-rich cathodes can be improved via the appropriate use of additives. They also indicate that among the tested additive candidates in this study, PS is highly desirable for enhancing the electrochemical performance of Ni-rich cathodes.
AB - Lithium-nickel-cobalt-manganese oxide, Li[NixCo yMnz]O2 (NCM) is a low-cost cathode material with a high capacity and a moderately high rate capability, however, it still suffers from poor electrochemical performance. In this study, several types of additives are attempted to enhance the surface stability of high-Ni-content (Ni ≥ 60%) cathodes and the most effective additive turns out to be PS. The cycle performance in the presence of 2% PS is much improved at a high temperature of 60 C: (1) 98.9% of its initial capacity is preserved, (2) the increase in thickness is only 17.9%, preventing undesired swellings, and (3) gases are not generated in large amounts with the internal pressure being 56.4 kPa. The FT-IR spectroscopy results suggest that the surface of the cathode in the presence of 2% PS is covered with a film of alkyl sulfone components (RSOSR and RSO 2SR), which is possibly formed by the electrochemical oxidation of PS. The current results confirm that the electrochemical performance of Ni-rich cathodes can be improved via the appropriate use of additives. They also indicate that among the tested additive candidates in this study, PS is highly desirable for enhancing the electrochemical performance of Ni-rich cathodes.
KW - 1,3-Propane sulfone
KW - Additive
KW - Cathode
KW - Lithium nickel cobalt manganese oxide
KW - Sulfone
UR - http://www.scopus.com/inward/record.url?scp=84891686674&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84891686674&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2013.12.024
DO - 10.1016/j.jpowsour.2013.12.024
M3 - Article
AN - SCOPUS:84891686674
VL - 253
SP - 48
EP - 54
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -