Gaseous SO <sub>2</sub> Additive for High‐Energy‐Density Li‐Ion Battery
Abstract
Abstract Electrolyte additive engineering is pivotal for suppressing interfacial degradation and enhancing the cycling stability of high‐energy‐density batteries. However, conventional solid or liquid additives face inherent limitations such as high production costs, chemical instability, and inefficient interfacial passivation, restricting their practical application. Here, we propose an electrolyte engineering strategy that makes sustainable use of sulfur dioxide (SO 2 ), an industrial waste‐derived gas, as a dual‐functional gaseous additive. Owing to its ultrahigh reduction potential (2.6 V versus Li + /Li), which exceeds that of most known additives, and a low oxidation potential, SO 2 promotes the in situ formation of sulfur‐containing interphases on both electrodes through preferential electrochemical reactions, thereby effectively suppressing parasitic electrolyte decomposition. SO 2 enables 4.4 V‐class AG || NCM613 pouch cells to achieve exceptional cyclability exceeding 800 cycles with 88.2% capacity retention, along with outstanding temperature tolerance from −30 °C to 45 °C. This strategy also demonstrates universal applicability, yielding a long life of 800 cycles for Ah‐level 4.3 V‐class Si/C || NCM811 pouch cells. Furthermore, this approach alleviates electrolyte discoloration, extending shelf life while reducing cost and energy consumption. This work establishes a sustainable circular economy model by valorizing industrial exhaust into high‐value battery components, bridging environmental stewardship with next‐generation energy storage innovation.
Article Details
Authors (16)
Xuequan Zhu
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering
Yueli Lin
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering
Qizheng Zheng
Liang Shi
Yuran Yang
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering
Jiyuan Xue
State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering Xiamen University Xiamen P. R. China
Chenyang Jiao
National Engineering Laboratory for Green Chemical Productions of Alcohols‐Ethers‐Esters State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P.R. China
Peng Wang
Yuying Gong
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering
Xingle Lin
Sunyes Shanshan Advanced Materials Technology (Quzhou) Co., Ltd Quzhou 324000 P.R. China
Qian Zhao
Zhejiang University , , ,
Lining Pan
Sunyes Shanshan Advanced Materials Technology (Quzhou) Co., Ltd Quzhou 324000 P.R. China
Junhao Wang
Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering
Yeguo Zou
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering
Yu Qiao
Shi‐Gang Sun
State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen P. R. China