A novel zwitterionic polymer binder with enhanced ionic conductivity for water-processable LiFePO4 cathodes
| Autor: | Xueqin He, Shu Huang, Shaojun Chen, Haitao Zhuo, Youyuan Huang, Xiaoting Huang, Xiaokai Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Battery (electricity) 02 engineering and technology General Chemistry Polymer Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law Materials Chemistry Ionic conductivity 0210 nano-technology Ionomer |
| Zdroj: | New Journal of Chemistry. 45:11130-11135 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/d1nj01401c |
| Popis: | Current olivine structure LiFePO4 possesses poor conductivity, which makes it unsuitable for unparalleled battery applications. This issue can be solved by improved design concepts of binder systems. Herein, an original waterborne binder polymer with efficient functional groups is designed and fabricated for LiFePO4 cathodes of lithium-ion batteries (LIBs). Compared to universal lithiated ionomer binders, the introduction of the zwitterionic structure of the ionomer enhances the ionic conductivity by nearly 100-fold. LiFePO4 cathodes assembled with limited 1.5 wt% lithiated zwitterionic ionomer (LZI) maintain markedly stable cycling performances with 95.62% retention at 1C after 250 cycles. Also, LZI-cathodes preserve good integrity structures after cycling, as confirmed by morphology analysis. In sum, LZI-cathodes look promising for potential applications in LIBs due to their numerous advantageous characteristics. |
| Databáze: | OpenAIRE |
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