Abstract
A carbon nanotube sheet having homogeneously distributed BaTiO 3 is applied to the Li-S cell system as a pseudo-current collector between the cathode and separator. This interlayer serves as a site distributor, where polysulfide eluted from the cathode continuously reacts, and it is expected to play a role as a more effective current collector by mixing the ferroelectric material. A cell utilizing a ferroelectricity embedded interlayer exhibits a higher capacity (908 mAh g −1 ) at 0.2C than that of carbon alone (740 mAh g −1 ) at 200 th cycle. This result corresponds to a capacity retention ratio enhancement from 67.5% to 75.6%. Furthermore, it is confirmed that the retention of the coulombic efficiency is effectively maintained in long cycles at 0.5C (94.5%–99.6%). This is not only because the modified interlayer functions as an effective current collector owing to the high affinity of the ferroelectric material to polysulfide, but also because ferroelectricity in the interlayer acts as a polysulfide anchor. The evenly distributed polarization leads to a uniform deposition of sulfur, which results in the prevention of inactive sulfur agglomeration and dissolution of polysulfide. Thus, the utilization of active material can be improved with stabilized reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 35-41 |
| Number of pages | 7 |
| Journal | Journal of Power Sources |
| Volume | 419 |
| DOIs | |
| Publication status | Published - 2019 Apr 15 |
Fingerprint
Keywords
- Barium titanate
- Electrochemistry
- Ferroelectricity
- Interlayer
- Lithium ion battery
- Sulfur cathode
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Dual functional effect of the ferroelectricity embedded interlayer in lithium sulfur battery. / Son, Byung Dae; Cho, Sung Ho; Bae, Ki Yoon; Kim, Byung Hyuk; Yoon, Wooyoung.
In: Journal of Power Sources, Vol. 419, 15.04.2019, p. 35-41.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dual functional effect of the ferroelectricity embedded interlayer in lithium sulfur battery
AU - Son, Byung Dae
AU - Cho, Sung Ho
AU - Bae, Ki Yoon
AU - Kim, Byung Hyuk
AU - Yoon, Wooyoung
PY - 2019/4/15
Y1 - 2019/4/15
N2 - A carbon nanotube sheet having homogeneously distributed BaTiO 3 is applied to the Li-S cell system as a pseudo-current collector between the cathode and separator. This interlayer serves as a site distributor, where polysulfide eluted from the cathode continuously reacts, and it is expected to play a role as a more effective current collector by mixing the ferroelectric material. A cell utilizing a ferroelectricity embedded interlayer exhibits a higher capacity (908 mAh g −1 ) at 0.2C than that of carbon alone (740 mAh g −1 ) at 200 th cycle. This result corresponds to a capacity retention ratio enhancement from 67.5% to 75.6%. Furthermore, it is confirmed that the retention of the coulombic efficiency is effectively maintained in long cycles at 0.5C (94.5%–99.6%). This is not only because the modified interlayer functions as an effective current collector owing to the high affinity of the ferroelectric material to polysulfide, but also because ferroelectricity in the interlayer acts as a polysulfide anchor. The evenly distributed polarization leads to a uniform deposition of sulfur, which results in the prevention of inactive sulfur agglomeration and dissolution of polysulfide. Thus, the utilization of active material can be improved with stabilized reaction.
AB - A carbon nanotube sheet having homogeneously distributed BaTiO 3 is applied to the Li-S cell system as a pseudo-current collector between the cathode and separator. This interlayer serves as a site distributor, where polysulfide eluted from the cathode continuously reacts, and it is expected to play a role as a more effective current collector by mixing the ferroelectric material. A cell utilizing a ferroelectricity embedded interlayer exhibits a higher capacity (908 mAh g −1 ) at 0.2C than that of carbon alone (740 mAh g −1 ) at 200 th cycle. This result corresponds to a capacity retention ratio enhancement from 67.5% to 75.6%. Furthermore, it is confirmed that the retention of the coulombic efficiency is effectively maintained in long cycles at 0.5C (94.5%–99.6%). This is not only because the modified interlayer functions as an effective current collector owing to the high affinity of the ferroelectric material to polysulfide, but also because ferroelectricity in the interlayer acts as a polysulfide anchor. The evenly distributed polarization leads to a uniform deposition of sulfur, which results in the prevention of inactive sulfur agglomeration and dissolution of polysulfide. Thus, the utilization of active material can be improved with stabilized reaction.
KW - Barium titanate
KW - Electrochemistry
KW - Ferroelectricity
KW - Interlayer
KW - Lithium ion battery
KW - Sulfur cathode
UR - http://www.scopus.com/inward/record.url?scp=85061718195&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061718195&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.02.014
DO - 10.1016/j.jpowsour.2019.02.014
M3 - Article
AN - SCOPUS:85061718195
VL - 419
SP - 35
EP - 41
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -