A thin Si nanowire network anode for high volumetric capacity and long-life lithium-ion batteries  

作　　者：Ibrahim Saana Amiinu Sumair Imtiaz Hugh Geaney Tadhg Kennedy Nilotpal Kapuria Shalini Singh Kevin M Ryan 

机构地区：[1]Bernal Institute,University of Limerick,Limerick V94 T9PX,Ireland [2]Department of Chemical Sciences,University of Limerick,Limerick V94 T9PX,Ireland

出　　处：《Journal of Energy Chemistry》2023年第6期20-27,I0002,共9页能源化学（英文版）

基　　金：funded by the Science Foundation Ireland (SFI)under the Principal Investigator Program under contract No.11PI-1148,16/IA/4629 and SFI 16/M-ERA/3419;funding under the European Union’s Horizon 2020 Research and Innovation Program;grant agreement No.814464 (Si-DRIVE project);IRCLA/2017/285 and SFI Research Centres AMBER,Ma REI and CONFIRM 12/RC/2302_P2,12/RC/2278_P2,and 16/RC/3918;SFI for SIRG grant No.18/SIRG/5484;support from the Sustainable Energy Authority of Ireland through the Research Development and Demonstration Funding Program (Grant No.19/RDD/548);Enterprise Ireland through the Innovation Partnership Program (Grant No.IP 20190910);support from the SFI Research Centre Ma REI (award reference No.12/RC/2302_P2);support from the SFI Industry RD&I Fellowship Program (21/IRDIF/9876);the EU Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Individual Fellowship Grant (843621)。

摘　　要：Silicon nanowires(Si NWs)have been widely researched as the best alternative to graphite anodes for the next-generation of high-performance lithium-ion batteries(LIBs)owing to their high capacity and low discharge potential.However,growing binder-free Si NW anodes with adequate mass loading and stable capacity is severely limited by the low surface area of planar current collectors(CCs),and is particularly challenging to achieve on standard pure-Cu substrates due to the ubiquitous formation of Li+inactive silicide phases.Here,the growth of densely-interwoven In-seeded Si NWs is facilitated by a thin-film of copper-silicide(CS)network in situ grown on a Cu-foil,allowing for a thin active NW layer(<10μm thick)and high areal loading(≈1.04 mg/cm^(2))binder-free electrode architecture.The electrode exhibits an average Coulombic efficiency(CE)of>99.6%and stable performance for>900 cycles with≈88.7%capacity retention.More significantly,it delivers a volumetric capacity of≈1086.1 m A h/cm^(3)at 5C.The full-cell versus lithium manganese oxide(LMO)cathode delivers a capacity of≈1177.1 m A h/g at 1C with a stable rate capability.This electrode architecture represents significant advances toward the development of binder-free Si NW electrodes for LIB application.

关 键 词：Si NW anode SILICIDATION LMO cathode Amorphous ligaments Volumetric capacity Lithium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]