出版商 PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN: 0013-4686 eISSN: 1873-3859
研究领域 Electrochemistry
摘要
Nickel tin alloy nanoparticles (NPs) with tuned composition NixSn (0.6 <= x <= 1.9) were synthesized by a solution-based procedure and used as anode materials for Li-ion batteries (LIBs) and Na-ion batteries (SIBs). Among the compositions tested, Ni0.9Sn-based electrodes exhibited the best performance in both LIBs and SIBs. As LIB anodes, Ni0.9Sn-based electrodes delivered charge-discharge capacities of 980 mAh g(-1) after 340 cycles at 0.2 A g(-1) rate, which surpassed their maximum theoretical capacity considering that only Sn is lithiated. A kinetic characterization of the charge-discharge process demonstrated the electrode performance to be aided by a significant pseudocapacitive contribution that compensated for the loss of energy storage capacity associated to the solid-electrolyte interphase formation. This significant pseudocapacitive contribution, which not only translated into higher capacities but also longer durability, was associated to the small size of the crystal domains and the proper electrode composition. The performance of NixSn-based electrodes toward Na-ion storage was also characterized, reaching significant capacities above 200 mAh g(-1) at 0.1 A g(-1) but with a relatively fast fade over 120 continuous cycles. A relatively larger pseudocapacitive contribution was obtained in NixSn-based electrodes for SIBs when compared with LIBs, consistently with the lower contribution of the Na ion diffusion associated to its larger size. (C) 2019 Elsevier Ltd. All rights reserved.
Catalonia Inst Energy Res IREC, Barcelona 08930, Spain. 增强组织信息的名称 Institut de Recerca en Energia de Catalunya (IREC)
通讯作者地址:Liu, J (通讯作者)
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China. 增强组织信息的名称 South China University of Technology
This work was supported by the European Regional Development Funds and by the Spanish Ministerio de Economia y Competitividad through the project SEHTOP (ENE2016-77798-C4-3-R). J. Li thanks the China Scholarship Council for scholarship support. This project was supported by the National Natural Science Foundation of China (no. 51771076), the "1000 plan" from Chinese Government, and the Project of Public Interest Research and Capacity Building of Guangdong Province (no. 2017A010104004). T. Zhang, P. Tang and J. Arbiol acknowledge funding from Generalitat de Catalunya 2017 SGR 327 and the Spanish MINECO coordinated projects between IREC and ICN2 VALPEC and subprojects RESOL and ANAPHASE (ENE2017-85087-C3). ICN2 acknowledges support from the Severo Ochoa Programme (MINECO, Grant no. SEV-2013-0295) and is funded by the CERCA Programme / Generalitat de Catalunya. T. Zhang has received funding from the CSC-UAB PhD scholarship program. Part of the present work has been performed in the framework of Universitat Autonoma de Barcelona Materials Science PhD program. J. Llorca is a Serra Hunter Fellow and is grateful to ICREA Academia program and to MINECO/FEDER grant ENE2015-63969-R and GC 2017 SGR 128.
出版商
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
