TY - JOUR
T1 - Revealing Seed-Mediated Structural Evolution of Copper-Silicide Nanostructures
T2 - Generating Structured Current Collectors for Rechargeable Batteries
AU - Sankaran, Abinaya
AU - Kapuria, Nilotpal
AU - Beloshapkin, Sergey
AU - Ahad, Syed Abdul
AU - Singh, Shalini
AU - Geaney, Hugh
AU - Ryan, Kevin M.
N1 - Publisher Copyright:
© 2024 The Authors. Advanced Materials published by Wiley-VCH GmbH.
PY - 2024/6/6
Y1 - 2024/6/6
N2 - Metal silicide thin films and nanostructures typically employed in electronics have recently gained significant attention in battery technology, where they are used as active or inactive materials. However, unlike thin films, the science behind the evolution of silicide nanostructures, especially 1D nanowires (NWs), is a key missing aspect. CuxSiy nanostructures synthesized by solvent vapor growth technique are studied as a model system to gain insights into metal silicide formation. The temperature-dependent phase evolution of CuxSiy structures proceeds from Cu>Cu0.83Si0.17>Cu5Si>Cu15Si4. The role of Cu diffusion kinetics on the morphological progression of Cu silicides is studied, revealing that the growth of 1D metal silicide NWs proceeds through an in situ formed, Cu seed-mediated, self-catalytic process. The different CuxSiy morphologies synthesized are utilized as structured current collectors for K-ion battery anodes. Sb deposited by thermal evaporation upon Cu15Si4 tripod NWs and cube architectures exhibit reversible alloying capacities of 477.3 and 477.6 mAh g−1 at a C/5 rate. Furthermore, Sb deposited Cu15Si4 tripod NWs anode tested in Li-ion and Na-ion batteries demonstrate reversible capacities of ≈518 and 495 mAh g−1.
AB - Metal silicide thin films and nanostructures typically employed in electronics have recently gained significant attention in battery technology, where they are used as active or inactive materials. However, unlike thin films, the science behind the evolution of silicide nanostructures, especially 1D nanowires (NWs), is a key missing aspect. CuxSiy nanostructures synthesized by solvent vapor growth technique are studied as a model system to gain insights into metal silicide formation. The temperature-dependent phase evolution of CuxSiy structures proceeds from Cu>Cu0.83Si0.17>Cu5Si>Cu15Si4. The role of Cu diffusion kinetics on the morphological progression of Cu silicides is studied, revealing that the growth of 1D metal silicide NWs proceeds through an in situ formed, Cu seed-mediated, self-catalytic process. The different CuxSiy morphologies synthesized are utilized as structured current collectors for K-ion battery anodes. Sb deposited by thermal evaporation upon Cu15Si4 tripod NWs and cube architectures exhibit reversible alloying capacities of 477.3 and 477.6 mAh g−1 at a C/5 rate. Furthermore, Sb deposited Cu15Si4 tripod NWs anode tested in Li-ion and Na-ion batteries demonstrate reversible capacities of ≈518 and 495 mAh g−1.
KW - metal silicide
KW - nanowire
KW - potassium ion battery
KW - seed-mediated growth
UR - http://www.scopus.com/inward/record.url?scp=85187148242&partnerID=8YFLogxK
U2 - 10.1002/adma.202310823
DO - 10.1002/adma.202310823
M3 - Article
AN - SCOPUS:85187148242
SN - 0935-9648
VL - 36
JO - Advanced Materials
JF - Advanced Materials
IS - 23
M1 - 2310823
ER -