Electrochemical properties of PX-phase PbTiO3 electrode for sodium ion batteries

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	Electrochemical properties of PX-phase PbTiO3 electrode for sodium ion batteries
	Zhang, Yixiang 1; Ji, Muwei 1,2,3; Liu, Ziyi 1; He, Yiqing 1; Hu, Yao 1; Yang, Qinghua 1; Li, Bo 1; Wang, Jin 1
刊名	RSC ADVANCES
	2017
卷号	7 期号:41 页码:25678-25684
英文摘要	PX-phase PbTiO3 (PT) nanowires have been investigated for the first time as an anode material for sodium ion batteries (NIBs). Their sodium storage properties are presented by employing sodium-carboxyl-methylcellulose (CMC) and styrene-butadiene-rubber (SBR) as binders. Electrochemical results show that the PT/CMC-SBR electrode delivers a specific capacity of 84.2 mA h g(-1) after 100 cycles. The PT nanowires are found to undergo an irreversible conversion reaction to transform into a composite structure composed of 5-8 nm Pb nanoparticles uniformly dispersed in the amorphous matrixes in the initial discharge process. In the subsequent cycling process, the discharge capacity is primarily attributed to alloying reaction between Pb and Na and conversion reaction between Pb and PbO2. Furthermore, we use polyvinylidene fluoride (PVDF) instead of CMC-SBR as binder to study the influence of binders on the electrochemical performance of PX-phase PT anode. It is found that PT/CMC-SBR electrode exhibits better electrochemical properties than PT/PVDF electrode in both cyclic performance and rate capability. Detailed analysis is conducted to understand the underlying mechanism for the distinct NIBs anode performance of PT nanowires caused by use of different binders. It is found that compared to PT/CMC-SBR electrode, the conversion reaction between Pb and PbO2 is missing in the PT/PVDF electrode, and that Pb active material has diffused out from the wires and reprecipitated as microsized hexagonal particles during the discharge/charge process, leading to the inferior electrochemical performance of PT/PVDF electrodes. This work signifies the importance of binders to optimize the electrochemical performance for alloy anode materials in NIBs.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38401]
专题	化学研究所_其它
作者单位	1.Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 3.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518061, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yixiang,Ji, Muwei,Liu, Ziyi,et al. Electrochemical properties of PX-phase PbTiO3 electrode for sodium ion batteries[J]. RSC ADVANCES,2017,7(41):25678-25684.
APA	Zhang, Yixiang.,Ji, Muwei.,Liu, Ziyi.,He, Yiqing.,Hu, Yao.,...&Wang, Jin.(2017).Electrochemical properties of PX-phase PbTiO3 electrode for sodium ion batteries.RSC ADVANCES,7(41),25678-25684.
MLA	Zhang, Yixiang,et al."Electrochemical properties of PX-phase PbTiO3 electrode for sodium ion batteries".RSC ADVANCES 7.41(2017):25678-25684.