Titanium–oxo cluster reinforced gel polymer electrolyte enabling lithium–sulfur batteries with high gravimetric energy densities
- 23 December 2020
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 14 (2), 975-985
- https://doi.org/10.1039/d0ee03005h
Abstract
Lithium–sulfur (Li–S) battery research has flourished by upgrading the performances of sulfur cathodes and Li metal anodes under flooded electrolyte conditions. However, since high gravimetric energy density can only be achieved at a low electrolyte/sulfur (E/S) ratio, the severe performance degradation under lean electrolyte conditions is becoming a bottleneck in the development of Li–S batteries. Here we propose a new class of gel polymer electrolytes by using titanium–oxo clusters as reinforcements to construct low E/S batteries. The developed electrolyte has favorable mechanical properties and high Li-ion conductivity, as well as excellent capabilities to block polysulfide shuttling and suppress Li dendrite formation, enabling low E/S batteries to exhibit enhanced capacities and cycling stabilities. Remarkably, the low E/S (3 μL mgS −1) battery fabricated with high sulfur loading (10 mgS cm−2) and low negative/positive capacity ratio (1/1) can deliver a gravimetric energy density of 423 W h kg−1 and continue to operate for 100 cycles. This study provides a new avenue for high-energy-density Li–S batteries.Keywords
Funding Information
- National Key Research and Development Program of China (2017YFA0207302)
- National Science Foundation (21731005, 21420102001, 21721001, 21801213)
- Fundamental Research Funds for the Central Universities (20720160080, 20720180026)
This publication has 58 references indexed in Scilit:
- A Review of Functional Binders in Lithium–Sulfur BatteriesAdvanced Energy Materials, 2018
- Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical ApplicationElectrochemical Energy Reviews, 2018
- A Two-Dimensional Porous Carbon-Modified Separator for High-Energy-Density Li-S BatteriesJoule, 2018
- Self-supporting sulfur cathodes enabled by two-dimensional carbon yolk-shell nanosheets for high-energy-density lithium-sulfur batteriesNature Communications, 2017
- Enabling High-Areal-Capacity Lithium–Sulfur Batteries: Designing Anisotropic and Low-Tortuosity Porous ArchitecturesACS Nano, 2017
- A New Type of Multifunctional Polar Binder: Toward Practical Application of High Energy Lithium Sulfur BatteriesAdvanced Materials, 2017
- Rational designs and engineering of hollow micro-/nanostructures as sulfur hosts for advanced lithium–sulfur batteriesEnergy & Environmental Science, 2016
- Advances in lithium–sulfur batteries based on multifunctional cathodes and electrolytesNature Energy, 2016
- Metal–organic framework-based separator for lithium–sulfur batteriesNature Energy, 2016
- Rechargeable Lithium–Sulfur BatteriesChemical Reviews, 2014