Abstract
Lithium-sulfur (Li-S) batteries are highly considered as a next-generation energy storage device due to their high theoretical energy density. For practical viability, reasonable active-material loading of >4.0 mg cm −2 must be employed, at a cost to the intrinsic instability of sulfur cathodes. The incursion of lithium polysulfides (LiPS) at higher sulfur loadings results in low active material utilization and poor cell cycling capability. The use of high-surface-area hierarchical macro/mesoporous inverse opal (IOP) carbons to investigate the effects of pore volume and surface area on the electrochemical stability of high-loading, high-thickness cathodes for Li-S batteries is presented here. The IOP carbons are additionally doped with pyrrolic-type nitrogen groups (N-IOP) to act as a polar polysulfide mediator and enhance the active-material reutilization. With a high sulfur loading of 6.0 mg cm −2 , the Li-S cells assembled with IOP and N-IOP carbons are able to attain a high specific capacity of, respectively, 1242 and 1162 mA h g −1 . The N-IOP enables the Li-S cells to demonstrate good electrochemical performance over 300 cycles.
| Original language | English |
|---|---|
| Article number | 1900690 |
| Journal | Small |
| Volume | 15 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 2019 Apr 18 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Biotechnology
- Biomaterials
- Chemistry(all)
- Materials Science(all)
Cite this
}
Pyrrolic-Type Nitrogen-Doped Hierarchical Macro/Mesoporous Carbon as a Bifunctional Host for High-Performance Thick Cathodes for Lithium-Sulfur Batteries. / Han, Pauline; Chung, Sheng Heng; Manthiram, Arumugam.
In: Small, Vol. 15, No. 16, 1900690, 18.04.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - Pyrrolic-Type Nitrogen-Doped Hierarchical Macro/Mesoporous Carbon as a Bifunctional Host for High-Performance Thick Cathodes for Lithium-Sulfur Batteries
AU - Han, Pauline
AU - Chung, Sheng Heng
AU - Manthiram, Arumugam
PY - 2019/4/18
Y1 - 2019/4/18
N2 - Lithium-sulfur (Li-S) batteries are highly considered as a next-generation energy storage device due to their high theoretical energy density. For practical viability, reasonable active-material loading of >4.0 mg cm −2 must be employed, at a cost to the intrinsic instability of sulfur cathodes. The incursion of lithium polysulfides (LiPS) at higher sulfur loadings results in low active material utilization and poor cell cycling capability. The use of high-surface-area hierarchical macro/mesoporous inverse opal (IOP) carbons to investigate the effects of pore volume and surface area on the electrochemical stability of high-loading, high-thickness cathodes for Li-S batteries is presented here. The IOP carbons are additionally doped with pyrrolic-type nitrogen groups (N-IOP) to act as a polar polysulfide mediator and enhance the active-material reutilization. With a high sulfur loading of 6.0 mg cm −2 , the Li-S cells assembled with IOP and N-IOP carbons are able to attain a high specific capacity of, respectively, 1242 and 1162 mA h g −1 . The N-IOP enables the Li-S cells to demonstrate good electrochemical performance over 300 cycles.
AB - Lithium-sulfur (Li-S) batteries are highly considered as a next-generation energy storage device due to their high theoretical energy density. For practical viability, reasonable active-material loading of >4.0 mg cm −2 must be employed, at a cost to the intrinsic instability of sulfur cathodes. The incursion of lithium polysulfides (LiPS) at higher sulfur loadings results in low active material utilization and poor cell cycling capability. The use of high-surface-area hierarchical macro/mesoporous inverse opal (IOP) carbons to investigate the effects of pore volume and surface area on the electrochemical stability of high-loading, high-thickness cathodes for Li-S batteries is presented here. The IOP carbons are additionally doped with pyrrolic-type nitrogen groups (N-IOP) to act as a polar polysulfide mediator and enhance the active-material reutilization. With a high sulfur loading of 6.0 mg cm −2 , the Li-S cells assembled with IOP and N-IOP carbons are able to attain a high specific capacity of, respectively, 1242 and 1162 mA h g −1 . The N-IOP enables the Li-S cells to demonstrate good electrochemical performance over 300 cycles.
UR - http://www.scopus.com/inward/record.url?scp=85063583397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063583397&partnerID=8YFLogxK
U2 - 10.1002/smll.201900690
DO - 10.1002/smll.201900690
M3 - Article
C2 - 30913376
AN - SCOPUS:85063583397
VL - 15
JO - Small
JF - Small
SN - 1613-6810
IS - 16
M1 - 1900690
ER -