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Unravelling binder chemistry in sodium/potassium ion batteries for superior electrochemical performances

Journal Article


Abstract


  • The binder chemistry in Na/K ion batteries is important to electrochemical performance. Here, commercial TiO2 nanoparticles are employed as a model to illustrate the binder chemistry in ethers, with polyvinylidene difluoride (PVdF) and sodium carboxymethyl cellulose (CMC) as the examples. An electrode using CMC as the binder shows superior electrochemical performance to that using PVdF, especially in terms of initial coulombic efficiency (80.1% for CMC vs. 52.5% for PVdF). The worse performance of the electrode using PVdF is mainly due to electrochemical defluorination of PVdF, which leads to cleavage of C-F and the formation of NaF over the electrode. Last but not least, a similar improvement in the binder chemistry works for many anode materials in Na/K-ion batteries. This journal is

Publication Date


  • 2022

Citation


  • Wang, C., Su, L., Wang, N., Lv, D., Wang, D., Yang, J., & Qian, Y. (2022). Unravelling binder chemistry in sodium/potassium ion batteries for superior electrochemical performances. Journal of Materials Chemistry A, 10(8), 4060-4067. doi:10.1039/d1ta09516a

Scopus Eid


  • 2-s2.0-85125322357

Start Page


  • 4060

End Page


  • 4067

Volume


  • 10

Issue


  • 8

Place Of Publication


Abstract


  • The binder chemistry in Na/K ion batteries is important to electrochemical performance. Here, commercial TiO2 nanoparticles are employed as a model to illustrate the binder chemistry in ethers, with polyvinylidene difluoride (PVdF) and sodium carboxymethyl cellulose (CMC) as the examples. An electrode using CMC as the binder shows superior electrochemical performance to that using PVdF, especially in terms of initial coulombic efficiency (80.1% for CMC vs. 52.5% for PVdF). The worse performance of the electrode using PVdF is mainly due to electrochemical defluorination of PVdF, which leads to cleavage of C-F and the formation of NaF over the electrode. Last but not least, a similar improvement in the binder chemistry works for many anode materials in Na/K-ion batteries. This journal is

Publication Date


  • 2022

Citation


  • Wang, C., Su, L., Wang, N., Lv, D., Wang, D., Yang, J., & Qian, Y. (2022). Unravelling binder chemistry in sodium/potassium ion batteries for superior electrochemical performances. Journal of Materials Chemistry A, 10(8), 4060-4067. doi:10.1039/d1ta09516a

Scopus Eid


  • 2-s2.0-85125322357

Start Page


  • 4060

End Page


  • 4067

Volume


  • 10

Issue


  • 8

Place Of Publication