Dense-Stacking Porous Conjugated Polymer as Reactive-Type Host for High-Performance Lithium Sulfur Batteries.
Angew Chem Int Ed Engl
; 60(20): 11359-11369, 2021 May 10.
Article
en En
| MEDLINE
| ID: mdl-33751750
ABSTRACT
Commercialization of the lithium-sulfur battery is hampered by bottlenecks like low sulfur loading, high cathode porosity, uncontrollable Li2 Sx deposition and sluggish kinetics of Li2 S activation. Herein, we developed a densely stacked redox-active hexaazatrinaphthylene (HATN) polymer with a surface area of 302â
m2 g-1 and a very high bulk density of ca. 1.60â
g cm-3 . Uniquely, HATN polymer has a similar redox potential window to S, which facilitates the binding of Li2 Sx and its transformation chemistry within the bulky polymer host, leading to fast Li2 S/S kinetics. The compact polymer/S electrode presents a high sulfur loading of ca. 15â
mgs cm-2 (200-µm thickness) with a low cathode porosity of 41 %. It delivers a high areal capacity of ca. 14â
mAh cm-2 and good cycling stability (200â
cycles) at electrolyte-sulfur (E/S) ratio of 5â
µL mgs -1 . The assembled pouch cell delivers a cell-level high energy density of 303â
Wh kg-1 and 392â
Wh L-1 .
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Año:
2021
Tipo del documento:
Article
País de afiliación:
Singapur