TY - JOUR
T1 - Fast Li-ion Storage and Dynamics in TiO2 Nanoparticle Clusters Probed by Smart Scanning Electrochemical Cell Microscopy
AU - Tetteh, Emmanuel Batsa
AU - Valavanis, Dimitrios
AU - Daviddi, Enrico
AU - Xu, Xiangdong
AU - Santana Santos, Carla
AU - Ventosa, Edgar
AU - Martín-Yerga, Daniel
AU - Schuhmann, Wolfgang
AU - Unwin, Patrick R.
N1 - Publisher Copyright:
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
PY - 2023/2/20
Y1 - 2023/2/20
N2 - Anatase TiO2 is a promising material for Li-ion (Li+) batteries with fast charging capability. However, Li+ (de)intercalation dynamics in TiO2 remain elusive and reported diffusivities span many orders of magnitude. Here, we develop a smart protocol for scanning electrochemical cell microscopy (SECCM) with in situ optical microscopy (OM) to enable the high-throughput charge/discharge analysis of single TiO2 nanoparticle clusters. Directly probing active nanoparticles revealed that TiO2 with a size of ≈50 nm can store over 30 % of the theoretical capacity at an extremely fast charge/discharge rate of ≈100 C. This finding of fast Li+ storage in TiO2 particles strengthens its potential for fast-charging batteries. More generally, smart SECCM-OM should find wide applications for high-throughput electrochemical screening of nanostructured materials.
AB - Anatase TiO2 is a promising material for Li-ion (Li+) batteries with fast charging capability. However, Li+ (de)intercalation dynamics in TiO2 remain elusive and reported diffusivities span many orders of magnitude. Here, we develop a smart protocol for scanning electrochemical cell microscopy (SECCM) with in situ optical microscopy (OM) to enable the high-throughput charge/discharge analysis of single TiO2 nanoparticle clusters. Directly probing active nanoparticles revealed that TiO2 with a size of ≈50 nm can store over 30 % of the theoretical capacity at an extremely fast charge/discharge rate of ≈100 C. This finding of fast Li+ storage in TiO2 particles strengthens its potential for fast-charging batteries. More generally, smart SECCM-OM should find wide applications for high-throughput electrochemical screening of nanostructured materials.
KW - Fast Charging
KW - Li-Ion Battery
KW - Scanning Electrochemical Cell Microscopy
KW - Single Particle
KW - Titania
UR - http://www.scopus.com/inward/record.url?scp=85146696703&partnerID=8YFLogxK
U2 - 10.1002/anie.202214493
DO - 10.1002/anie.202214493
M3 - Article
C2 - 36469735
AN - SCOPUS:85146696703
SN - 1433-7851
VL - 62
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 9
M1 - e202214493
ER -