Toward Extremely Fast Charging through Boosting Intercalative Redox Pseudocapacitance: A SbCrSe_3 Anode for Large and Fast Sodium Storage

Baixin Peng; Shumao Xu; Zhuoran LvShaoning ZhangYusha GaoTianquan LinFuqiang Huang

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Toward Extremely Fast Charging through Boosting Intercalative Redox Pseudocapacitance: A SbCrSe_3 Anode for Large and Fast Sodium Storage

机译：Toward Extremely Fast Charging through Boosting Intercalative Redox Pseudocapacitance: A SbCrSe_3 Anode for Large and Fast Sodium Storage

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摘要

Alloying-type metals with high theoretical capacity are promising anodematerials for sodium ion batteries, but suffer from large volume expansionand sluggish reaction kinetics. Dispersing alloying-type metal into a buffermatrix with interfacial anionic covalent bonding is an effective method tosolve the above issues. Here, this bifunctional structural unit is designed byincorporating high-capacity Sb metal into a rigid Cr-Se framework for fastchargingapplications. The high-capacity and high-rate sodium storage canbe synergistically realized in the bifunctional Sb-Cr-Se system, where therigid Cr-Se framework endows the SbCrSe_3 anodes with superior structuralstability and improved intercalative redox pseudocapacitance. Moreover,the volume expansion of Sb during discharge can be buffered by the Cr-Sechain-like matrix. The novel SbCrSe_3 anode delivers a high charge capacityof 472 mAh g~(?1) at a current density of 0.4 C and retains ≈100 capacity at60 C over 10 000 cycles. Further in situ and ex situ characterization revealthe multistep reaction mechanism, and the breakage and formation ofreversible Sb-Se bonds during (dis)charge. The proposed bifunctionalstructural unit that combines alloying type anodes and intercalative anodesis expected to pave a new road for the development of high capacity andhigh rate anode materials.

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《Advanced energy materials》 |2023年第2期|2203187.1-2203187.8|共8页
作者
Baixin Peng; Shumao Xu; Zhuoran LvShaoning ZhangYusha GaoTianquan LinFuqiang Huang;
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作者单位

State Key Laboratory of High Performance Ceramics and SuperfineMicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050, P. R. China, Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of;

State Key Laboratory of High Performance Ceramics and SuperfineMicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050, P. R. China;

School of Physical Science and TechnologyShanghaiTech UniversityShanghai 200031, P. R. ChinaSchool of Materials Science and EngineeringShanghai Jiao Tong University800 Dongchuan RD, Shanghai 200240, P. R. ChinaState Key Laboratory of High Performance Ceramics and SuperfineMicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050, P. R. China, Beijing National Laboratory for Molecular Sciences and State KeyLaboratory of Rare Earth Ma;

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high rate; intercalative pseudocapacitance; SbCrSe_3; sodium ion batteries;

Toward Extremely Fast Charging through Boosting Intercalative Redox Pseudocapacitance: A SbCrSe_3 Anode for Large and Fast Sodium Storage

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