| Title: |
Fast Li‐ion Storage and Dynamics in TiO 2 Nanoparticle Clusters Probed by Smart Scanning Electrochemical Cell Microscopy |
| Authors: |
Tetteh, Emmanuel Batsa; Valavanis, Dimitrios; Daviddi, Enrico; Xu, Xiangdong; Santana Santos, Carla; Ventosa, Edgar; Martín‐Yerga, Daniel; Schuhmann, Wolfgang; Unwin, Patrick R. |
| Contributors: |
Horizon 2020 Framework Programme |
| Source: |
Angewandte Chemie International Edition ; volume 62, issue 9 ; ISSN 1433-7851 1521-3773 |
| Publisher Information: |
Wiley |
| Publication Year: |
2023 |
| Collection: |
Wiley Online Library (Open Access Articles via Crossref) |
| Description: |
Anatase TiO 2 is a promising material for Li‐ion (Li + ) batteries with fast charging capability. However, Li + (de)intercalation dynamics in TiO 2 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 TiO 2 nanoparticle clusters. Directly probing active nanoparticles revealed that TiO 2 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 TiO 2 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1002/anie.202214493 |
| Availability: |
https://doi.org/10.1002/anie.202214493; https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.202214493; https://onlinelibrary.wiley.com/doi/full-xml/10.1002/anie.202214493 |
| Rights: |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Accession Number: |
edsbas.9971BBE3 |
| Database: |
BASE |