One-Step In Situ Preparation of Polymeric Selenium Sulfide Composite as a Cathode Material for Enhanced Sodium/Potassium Storage

Wenchao Zhang; Hongqiang Wang; Na Zhang; Huaguang Liu; Zhuo Chen; Lijuan Zhang; Shaopeng Guo; Dan Li; Jianzhong Xu

doi:10.1021/acsami.9b07540

journal article·2019-08-21

One-Step In Situ Preparation of Polymeric Selenium Sulfide Composite as a Cathode Material for Enhanced Sodium/Potassium Storage

Wenchao Zhang, Hongqiang Wang, Na Zhang, Huaguang Liu, Zhuo Chen, Lijuan Zhang, Shaopeng Guo, Dan Li, Jianzhong Xu

ACS Applied Materials & Interfaces· Volume 11· Issue 33

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Source abstract

Abstract

Alkali metal–sulfur/selenium batteries have attracted much attention because they offer promising high energy density. However, the shuttle effect of the polysulfide dissolutions, poor electrical conductivity, and relatively large volume variations greatly hinder their potential applications. Herein, a novel organic carbon/selenium sulfide (OC/SeS2) composite has been prepared by a one-step in situ method by heating the mixture of commercial polyacrylonitrile (PAN) with selenium sulfide powder in vacuum. The carbonized PAN matrix with an N-doped carbon ring structure could effectively confine SeS2 in the form of small molecules and regulate its electronic structure. The superior sodium/potassium storage performance of the OC/SeS2 composite electrodes stems from their rational chemical structure design, including high electrical conductivity of the N-doped organic carbon network and chemical binding with SeS2 molecules. As a result, the OC/SeS2 cathode delivers a reversible capacity of 416 mAh g–1 after 700 cycles for sodium-ion batteries and 216 mAh g–1 after 500 cycles for potassium-ion batteries at 0.5 A g–1, respectively. These findings could open a new window to develop selenium sulfide cathode for metal–sulfur/selenium batteries.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Polymers Composites

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China

Institute for Superconducting & Electronic Materials, University of Wollongong, NSW 2522, Australia

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China

School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China

Funding

China Postdoctoral Science Foundation · National Natural Science Foundation of China · Hebei Province Foundation for Returnees · Postdoctoral Science Foundation of Hebei Province · Chunhui Program of Ministry of Education of China · Provincial College Students Innovation and Entrepreneurship Project · Open Project of Laboratory Hebei University · Project for Top Young Talent and that for general colleges of Hebei Province

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