A Protein-Based Janus Separator for Trapping Polysulfides and Regulating Ion Transport in Lithium-Sulfur Batteries.
ChemSusChem
; 14(10): 2226-2236, 2021 May 20.
Article
en En
| MEDLINE
| ID: mdl-33754482
ABSTRACT
Lithium-sulfur (Li-S) batteries are a promising candidate for the next-generation energy storage system, yet their commercialization is primarily hindered by polysulfide shuttling and uncontrollable Li dendrite growth. Here, a protein-based Janus separator was designed and fabricated for suppressing both the shuttle effect and dendrite growth, while facilitating the Li+ transport. The Li metal-protecting layer was a protein/MoS2 nanofabric with high ionic conductivity and good Li+ affinity, thus capable of homogenizing the Li+ flux and facilitating the Li+ transport. The polysulfide-trapping layer was a conductive protein nanofabric enabling strong chemical/electrostatic interactions with polysulfides. Combination of the two layers was achieved by an integrated electrospinning method, yielding a robust and integral Janus separator. As a result, a long-lived symmetric Li|Li cell (>700â
h) with stable cycling performance was demonstrated. More significantly, the resulting Li-S battery delivered greatly improved electrochemical performance, including excellent rate capacity and remarkable cycle stability (with a low decay rate of 0.063 % per cycle at 0.5â
A g-1 over 500â
cycles). This study demonstrates the effectiveness of the Janus separator configurations for simultaneously addressing the shuttle effect and dendrite growth issues of Li-S batteries and broadens the applications of electrospinning in electrochemistry community.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
Asunto de la revista:
QUIMICA
/
TOXICOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Estados Unidos