Abstract
For the first time, an inorganic-organic hybrid polymer binder was used for the coating of hybrid composites on separators to enhance thermal stability and to prevent formation of lithium dendrite in lithium metal batteries. The fabricated hybrid-composite-coated separators exhibited minimal thermal shrinkage compared with the previous composite separators (<5% change in dimension), maintenance of porosity (Gurley number ∼400 s/100 cm3), and high ionic conductivity (0.82 mS/cm). Lithium metal battery cell examinations with our hybrid-composite-coated separators revealed excellent C-rate and cyclability performance due to the prevention of lithium dendrite growth on the lithium anode even after 200 cycles under 0.2-5C (charge-discharge) conditions. The mechanism for lithium dendrite prevention was attributed to exceptional nanoscale surface mechanical properties of the hybrid composite coating layer compared with the lithium metal anode, as the elastic modulus of the hybrid-composite-coated separator far exceeded those of both the lithium metal anode and the required threshold for lithium metal dendrite prevention.
| Original language | English |
|---|---|
| Pages (from-to) | 12852-12858 |
| Number of pages | 7 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 8 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 2016 May 25 |
| Externally published | Yes |
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Keywords
- lithium dendrite
- lithium metal battery
- separator
- silsesquioxane
- thermal stability
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Lithium Dendrite Suppression with UV-Curable Polysilsesquioxane Separator Binders. / Na, Wonjun; Lee, Albert S.; Lee, Jin Hong; Hwang, Seung Sang; Kim, Eunkyoung; Hong, Soon Man; Koo, Chong Min.
In: ACS Applied Materials and Interfaces, Vol. 8, No. 20, 25.05.2016, p. 12852-12858.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Lithium Dendrite Suppression with UV-Curable Polysilsesquioxane Separator Binders
AU - Na, Wonjun
AU - Lee, Albert S.
AU - Lee, Jin Hong
AU - Hwang, Seung Sang
AU - Kim, Eunkyoung
AU - Hong, Soon Man
AU - Koo, Chong Min
PY - 2016/5/25
Y1 - 2016/5/25
N2 - For the first time, an inorganic-organic hybrid polymer binder was used for the coating of hybrid composites on separators to enhance thermal stability and to prevent formation of lithium dendrite in lithium metal batteries. The fabricated hybrid-composite-coated separators exhibited minimal thermal shrinkage compared with the previous composite separators (<5% change in dimension), maintenance of porosity (Gurley number ∼400 s/100 cm3), and high ionic conductivity (0.82 mS/cm). Lithium metal battery cell examinations with our hybrid-composite-coated separators revealed excellent C-rate and cyclability performance due to the prevention of lithium dendrite growth on the lithium anode even after 200 cycles under 0.2-5C (charge-discharge) conditions. The mechanism for lithium dendrite prevention was attributed to exceptional nanoscale surface mechanical properties of the hybrid composite coating layer compared with the lithium metal anode, as the elastic modulus of the hybrid-composite-coated separator far exceeded those of both the lithium metal anode and the required threshold for lithium metal dendrite prevention.
AB - For the first time, an inorganic-organic hybrid polymer binder was used for the coating of hybrid composites on separators to enhance thermal stability and to prevent formation of lithium dendrite in lithium metal batteries. The fabricated hybrid-composite-coated separators exhibited minimal thermal shrinkage compared with the previous composite separators (<5% change in dimension), maintenance of porosity (Gurley number ∼400 s/100 cm3), and high ionic conductivity (0.82 mS/cm). Lithium metal battery cell examinations with our hybrid-composite-coated separators revealed excellent C-rate and cyclability performance due to the prevention of lithium dendrite growth on the lithium anode even after 200 cycles under 0.2-5C (charge-discharge) conditions. The mechanism for lithium dendrite prevention was attributed to exceptional nanoscale surface mechanical properties of the hybrid composite coating layer compared with the lithium metal anode, as the elastic modulus of the hybrid-composite-coated separator far exceeded those of both the lithium metal anode and the required threshold for lithium metal dendrite prevention.
KW - lithium dendrite
KW - lithium metal battery
KW - separator
KW - silsesquioxane
KW - thermal stability
UR - http://www.scopus.com/inward/record.url?scp=84973515244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84973515244&partnerID=8YFLogxK
U2 - 10.1021/acsami.6b02735
DO - 10.1021/acsami.6b02735
M3 - Article
VL - 8
SP - 12852
EP - 12858
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 20
ER -