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A Polymer‐Assisted Spinodal Decomposition Strategy toward Interconnected Porous Sodium Super Ionic Conductor‐Structured Polyanion‐Type Materials and Their Application as a High‐Power Sodium‐Ion Battery Cathode

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Xiong, Hailong, Qian, Ruicheng, Liu, Zhilin, Zhang, Rui, Sun, Ge, Guo, Bingkun, Du, Fei, Song, Shuyan +2 more·2021·Advanced Science

Abstract

A general polymer‐assisted spinodal decomposition strategy is used to prepare hierarchically porous sodium super ionic conductor (NASICON)‐structured polyanion‐type materials (e.g., Na 3 V 2(PO 4)3, Li 3 V 2(PO 4)3, K 3 V 2(PO 4)3, Na 4 MnV(PO 4)3, and Na 2 TiV(PO 4)3) in a tetrahydrofuran/ethanol/H 2 O synthesis system. Depending on the boiling point of solvents, the selective evaporation of the solvents induces both macrophase separation via spinodal decomposition and mesophase separation via self‐assembly of inorganic precursors and amphiphilic block copolymers, leading to the formation of hierarchically porous structures. The resulting hierarchically porous Na 3 V 2(PO 4)3 possessing large specific surface area (≈77 m 2 g−1) and pore volume (≈0.272 cm 3 g−1) shows a high specific capacity of 117.6 mAh g−1 at 0.1 C achieving the theoretical value and a long cycling life with 77% capacity retention over 1000 cycles at 5 C. This method presented here can open a facile avenue to synthesize other hierarchically porous polyanion‐type materials.

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  • An ID/IG ratio of 1 indicates a balanced amount of disordered and graphitic carbon structures.

    “indicating a balanced amount of disordered and graphitic carbon structures27.”

    From High-performance Na3V2(PO4)3/C cathode for efficient low-temperature lithium-ion batteries (2025) · cites this paper as [27]

    The Results and Discussion section identifies the D band as disorder-related and the G band as graphite-related, and reports ID/IG ratios of 1.01 and 0.98 for two samples. It does not say that a ratio near 1 establishes equal amounts of disordered and graphitic carbon; it uses the ratios to compare graphitization among samples. Page numbers are unavailable in our copy. (LLM, conf=0.82)

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Cited by

Sorted by citations

Authors
Xiong, H., Qian, R., Liu, Z., Zhang, R., Sun, G., Guo, B., Du, F., Song, S., Qiao, Z., & Dai, S.
Affiliations
  • Jilin University (CN)
  • Shanghai University (CN)
  • Chinese Academy of Sciences (CN)
  • Oak Ridge National Laboratory (US)
Corresponding author
Qiao, Zhen‐An
Venue
Advanced Science
Publisher
Wiley
Published
2021-03-20
Volume
8
Issue
11
Pages
e2004943-e2004943
ISSN
2198-3844 (ISSN-L)
OpenAlex
W3136774511
Cited by
55
References
35
Citations by year
2026: 6 · 2025: 11 · 2024: 10 · 2023: 10 · 2022: 9 · 2021: 9
FWCI
2.79
Type
journal article
Language
en
Open access
Locations
  • Advanced Science (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (21671073, 21621001)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Supercapacitor Materials and Fabrication
Keywords
NASICON, hierarchical porous materials, sodium-ion battery cathodes, Na3V2(PO4)3, amphiphilic block copolymers, solvent evaporation, specific capacity, cycling stability

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