Volume 136, Issue 6 e202317776
Forschungsartikel

Binary Atomic Sites Enable a Confined Bidirectional Tandem Electrocatalytic Sulfur Conversion for Low-Temperature All-Solid-State Na−S Batteries

Weiwei Zhang

Weiwei Zhang

Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui, 230601 China

School of Chemistry and Chemical Engineering, Qufu Normal University Qufu, Shandong, 273165 China

These authors contributed equally to this work.

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Mingli Wang

Mingli Wang

Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui, 230601 China

Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, 230026 China

These authors contributed equally to this work.

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Hong Zhang

Corresponding Author

Hong Zhang

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 China

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Xianglong Huang

Xianglong Huang

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054 China

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Boyuan Shen

Boyuan Shen

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 China

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Bin Song

Corresponding Author

Bin Song

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 China

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Lin Fu

Lin Fu

School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou, 550025 China

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Ke Lu

Corresponding Author

Ke Lu

Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui, 230601 China

Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, 230026 China

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First published: 20 December 2023

Abstract

The broader implementation of current all-solid-state Na−S batteries is still plagued by high operation temperature and inefficient sulfur utilization. And the uncontrollable sulfur speciation pathway along with the sluggish polysulfide redox kinetics further compromise the theoretical potentials of Na−S chemistry. Herein, we report a confined bidirectional tandem electrocatalysis effect to tune polysulfide electrochemistry in a novel low-temperature (80 °C) all-solid-state Na−S battery that utilizes Na3Zr2Si2PO12 ceramic membrane as a platform. The bifunctional hollow sulfur matrix consisting binary atomically dispersed MnN4 and CoN4 hotspots was fabricated using a sacrificial template process. Upon discharge, CoN4 sites activate sulfur species and catalyze long-chain to short-chain polysulfides reduction, while MnN4 centers substantially accelerate the low-kinetic Na2S4 to Na2S directly conversion, manipulating the uniform deposition of electroactive Na2S and avoiding the formation of irreversible products (e.g., Na2S2). The intrinsic synergy of two catalytic centers benefits the Na2S decomposition and minimizes its activation barrier during battery recharging and then efficiently mitigate the cathodic passivation. As a result, the stable cycling of all-solid-state Na−S cell delivers an attractive reversible capacity of 1060 mAh g−1 with a high CE of 98.5 % and a high energy of 1008 Wh kgcathode−1, comparable to the liquid electrolyte cells.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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