Building Lithium-Polycarbonsulfide Batteries with High Energy Density and Long Cycling Life
Source abstract
Abstract
The polysulfide shuttling and restricted kinetics of existing sulfur cathodes of lithium–sulfur batteries need to be tackled. Herein, we synthesized a polycarbonsulfide active material with an atomically assembled π-conjugated 3D conductive matrix via the self-polymerization of carbon disulfide (CS2) monomers. The as-synthesized polycarbonsulfide features oligo-S heterocycles assembled to conjugated conductive carbon chains. The coupled lithium-polycarbonsulfide battery delivered a high capacity of 724.5 mAh g–1 at 1.0 C (corresponding to 827.3 Wh kg–1) with an ultralow capacity decay rate of 0.032% per cycle, as well as high-rate capability of 499.6 mAh g–1 at 3.0 C. Multiple ex situ spectroscopic analyses revealed that the robust π-conjugated conductive polymeric matrix was well preserved during repeated battery operation, which efficiently tethered the discharge products to greatly restrict the shuttling effect.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Synthesis and properties of polymers · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
Funding
Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · Central University Basic Research Fund of China · National Natural Science Foundation of China · Nanjing International Collaboration Research Program · Jiangsu Province · Suzhou Gusu Leading Talent Program of Science and Technology Innovation and Entrepreneurship in Wujiang District
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