Sodium Ion Storage in Na_4MnV(PO_4)_3@C Free-Standing Electrode

Ping Hu; Ting Zhu; Congcong CaiBo MaiChen YangJianmin MaLiang ZhouHong Jin FanLiqiang Mai

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Sodium Ion Storage in Na_4MnV(PO_4)_3@C Free-Standing Electrode

机译：Sodium Ion Storage in Na_4MnV(PO_4)_3@C Free-Standing Electrode

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To enhance the energy density of batteries and explore intrinsic chargestorage mechanism of the active materials, it is important to reduce oreliminate the use of non-active materials in electrodes, such as binderand conductive additives. Herein, free-standing Na4MnV(PO_4)_3@C(F-NMVP@C) fiber membrane is fabricated and directly used as a sodiumionbattery (SIB) cathode. In situ X-ray diffraction reveals that the V~(3+)/V~(4+)redox reaction occurs through a solid-solution reaction while a two-phaseMn~(2+)/Mn~(3+) redox reaction is identified, and both are highly reversible.Meanwhile, ex situ electrochemical impedance spectroscopy revealsthat both the ion diffusion coefficient and charge transfer resistance ofF-NMVP@C change reversibly during the Na~+ intercalation/de-intercalation.Battery full cells are assembled based on the free-standing F-NMVP@Ccathodes and F-Sb@C anodes, which manifests a high energy density(293 Wh kg~(?1)) and good cyclability (87.5% after 100 cycles at 1 C). Thehigh-performance free-standing cathodes and anodes shed light on thedevelopment of flexible SIBs.

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来源
《Advanced functional materials》 |2022年第52期|2208051.1-2208051.8|共8页
作者
Ping Hu; Ting Zhu; Congcong CaiBo MaiChen YangJianmin MaLiang ZhouHong Jin FanLiqiang Mai;
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作者单位

Foshan Xianhu Laboratory of the Advanced EnergyScience and Technology Guangdong LaboratoryXianhu Hydrogen ValleyFoshan 528200, China,State Key Laboratory of Advanced Technology for Materials Synthesisand ProcessingWuhan University of TechnologyWuhan 43007;

State Key Laboratory of Advanced Technology for Materials Synthesisand ProcessingWuhan University of TechnologyWuhan 430070, China;

School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu 611731, ChinaSchool of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371, Singapore;

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正文语种英语
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free-standing membranes; Na4MnV(PO4)3; NASICON structures; sodium storage mechanisms; sodium-ion batteries;

Sodium Ion Storage in Na_4MnV(PO_4)_3@C Free-Standing Electrode

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