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- Title
Low‐Temperature Potassium Batteries Enabled by Electric and Thermal Field Regulation.
- Authors
Liu, Yanfang; Shi, Yating; Gao, Caitian; Shi, Zude; Ding, Hongbo; Feng, Yanhong; He, Yongmin; Sha, Junwei; Zhou, Jiang; Lu, Bingan
- Abstract
Recharging batteries operate at sub‐zero temperature is usually limited by the slow ion diffusion and uneven charge distribution at low temperature. Here, we report a strategy to regulate electric field and thermal field simultaneously, creating a fast and uniform deposition surroundings for potassium ion in potassium metal batteries (PMBs). This regulation is achieved by using a highly ordered 1D nanoarray electrode which provides a dense and flat surface for uniforming the electric field and high thermal conductivity for reducing the temperature fluctuation. Consequently, this electrode could achieve high‐areal capacity of 10 mAh cm−2. Besides, the dependence of potassium nucleation on temperature is unveiled. Furthermore, a full‐cell could steady operate with over 80 % of its room‐temperature capacity at −20 °C. Those respectable performances demonstrate that this strategy is valid, potentially providing guidelines for the rational design of advanced electrodes toward PMBs.
- Subjects
ELECTRIC batteries; ELECTRIC fields; POTASSIUM; THERMAL conductivity; POTASSIUM ions; TEMPERATURE distribution
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 16, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202300016