抄録
Asymmetric hybrid capacitors comprising an activated carbon (AC) positive electrode and a Li4Ti5O12 (LTO) negative electrode can achieve much higher energy density than conventional electric double layer capacitors. However, when operated at 3 V, the positive electrode develops an over-potential, leading to gas generation. Here, we investigated the feasibility of realizing a stable potential at the positive electrode using capacitance balancing. The voltage characteristics of the positive and negative electrodes were measured using a three-electrode system. The linear relationship between the potential and capacitance of the AC electrode was used to balance the capacitances of the two electrodes. Thus, stable operation and enhanced specific capacity were obtained at an operation voltage of 3 V.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 277-281 |
| ページ数 | 5 |
| ジャーナル | Electrochimica Acta |
| 巻 | 86 |
| DOI | |
| 出版物ステータス | Published - 2012 12 30 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Electrochemistry
- Chemical Engineering(all)
これを引用
Voltage characteristics and capacitance balancing for Li4Ti 5O12/activated carbon hybrid capacitors. / Yang, Jeong Jin; Choi, Chang Hae; Seo, Hyun Bum; Kim, Han Joo; Park, Soo Gil.
：: Electrochimica Acta, 巻 86, 30.12.2012, p. 277-281.研究成果: Article
}
TY - JOUR
T1 - Voltage characteristics and capacitance balancing for Li4Ti 5O12/activated carbon hybrid capacitors
AU - Yang, Jeong Jin
AU - Choi, Chang Hae
AU - Seo, Hyun Bum
AU - Kim, Han Joo
AU - Park, Soo Gil
PY - 2012/12/30
Y1 - 2012/12/30
N2 - Asymmetric hybrid capacitors comprising an activated carbon (AC) positive electrode and a Li4Ti5O12 (LTO) negative electrode can achieve much higher energy density than conventional electric double layer capacitors. However, when operated at 3 V, the positive electrode develops an over-potential, leading to gas generation. Here, we investigated the feasibility of realizing a stable potential at the positive electrode using capacitance balancing. The voltage characteristics of the positive and negative electrodes were measured using a three-electrode system. The linear relationship between the potential and capacitance of the AC electrode was used to balance the capacitances of the two electrodes. Thus, stable operation and enhanced specific capacity were obtained at an operation voltage of 3 V.
AB - Asymmetric hybrid capacitors comprising an activated carbon (AC) positive electrode and a Li4Ti5O12 (LTO) negative electrode can achieve much higher energy density than conventional electric double layer capacitors. However, when operated at 3 V, the positive electrode develops an over-potential, leading to gas generation. Here, we investigated the feasibility of realizing a stable potential at the positive electrode using capacitance balancing. The voltage characteristics of the positive and negative electrodes were measured using a three-electrode system. The linear relationship between the potential and capacitance of the AC electrode was used to balance the capacitances of the two electrodes. Thus, stable operation and enhanced specific capacity were obtained at an operation voltage of 3 V.
KW - Cell balancing
KW - Electrode potential profile
KW - Hybrid capacitors
KW - LiTiO
UR - http://www.scopus.com/inward/record.url?scp=84870691642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84870691642&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2012.02.060
DO - 10.1016/j.electacta.2012.02.060
M3 - Article
AN - SCOPUS:84870691642
VL - 86
SP - 277
EP - 281
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -