DataVXAdvanced Functional MaterialsPaper
journal article·2025-11Open access

Heterostructured Solid Electrolyte Interphase Enables Facilitated Kinetics for Low‐Temperature Sodium‐Ion Batteries

Yuyu Deng, Peiming Dai, Weibin Fu, Ling Che, Licheng Miao, Chengyu Chen, Lifang Jiao, Ting Jin

Advanced Functional Materials· Volume 35· Issue 48
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Source abstract

Abstract

Abstract Ether‐based electrolytes demonstrate competitiveness in sodium‐ion batteries (SIBs) operating at low temperatures due to their high ionic conductivities and low desolvation energies. However, the accumulation of inorganic components in the inner solid electrolyte interphase (SEI), caused by substantial sodium salt decomposition, impedes the kinetics of Na + interphasial transport. Here, a NaF/Na 2 CO 3 ‐rich heterostructured SEI, with significantly improved Na + diffusion kinetics, is proposed in a dilute ether‐based electrolyte. The heterostructure provides additional Na + transport pathways through Na 2 CO 3 and along the NaF/Na 2 CO 3 interface. The interfacial synergy effect between Na 2 CO 3 and NaF effectively reduces the Na + diffusion energy barrier and improves the mechanical robustness of SEI, ensuring facilitated interphasial kinetics. Consequently, the hard carbon (HC) anode delivers a high reversible specific capacity of 238 mAh g −1 at −40 °C and an impressive cycling stability at −20 °C with a capacity retention of 89.67% after 1800 cycles at 1 C. Additionally, the Na 0.85 Li 0.12 Ni 0.22 Mn 0.66 O 2 ||HC full cells exhibit a high discharge capacity of 85 mAh g −1 at −20 °C (85% of its room‐temperature capacity). This work underscores the critical role of engineering SEI with fast Na + transport kinetics for SIBs operating under low temperatures.
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Research context

Energy storage

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

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

Affiliations

Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of Chemistry Nankai University Tianjin 300071 China

State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710094 China

State Key Laboratory of Solidification Processing Center for Nano Energy Materials School of Materials Science and Engineering Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) Xi'an 710072 China

Chongqing Innovation Center Northwestern Polytechnical University Chongqing 401120 China

College of Chemistry and Material Science Key Laboratory of Agricultural Film Application of Ministry of Agriculture and Rural Affairs Shandong Agriculture University Tai'an 271018 China

Funding

National Natural Science Foundation of China · State Key Laboratory of Electrical Insulation and Power Equipment · Fundamental Research Funds for the Central Universities · Natural Science Foundation of Tianjin Municipality · Natural Science Foundation of Chongqing Municipality

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