Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nanoscaled Lithium Powders with Protection of Ionic Liquid for Highly Stable Rechargeable Lithium Metal Batteries
To suppress the dendrite formation and alleviate volume expansion upon striping/platting is a key challenge for developing practical lithium metal anodes. Lithium metal in powder form possesses great potential to address this issue due to large specific surface area. However, the fabrication of powdery metallic lithium is largely restricted because of its unique softness, stickiness, and high reactivity. Here, a safe and readily accessible cryomilling process toward lithium powders is reported. Nanoscaled lithium powders (<500 nm) are successfully prepared from lithium foils with the assistance of a high‐melting‐point ionic liquid under cryogenic temperature. The prepared lithium powder anode exhibits superior electrochemical properties in symmetric cells, including extraordinarily low yet stable overpotential (≈50 mV), ultrahigh area capacity (30 mAh cm−2), and good long‐term cyclability (1200 h) even cycling at high current density (10 mA cm−2). The powdery form of lithium also functions as a favorable prelithiation reagent for lithium‐free anodes (e.g., Si, SiO, and SnO2). The findings open up a new avenue for the real‐world application of lithium metal anodes for next‐generation lithium batteries.
Nanoscaled Lithium Powders with Protection of Ionic Liquid for Highly Stable Rechargeable Lithium Metal Batteries
To suppress the dendrite formation and alleviate volume expansion upon striping/platting is a key challenge for developing practical lithium metal anodes. Lithium metal in powder form possesses great potential to address this issue due to large specific surface area. However, the fabrication of powdery metallic lithium is largely restricted because of its unique softness, stickiness, and high reactivity. Here, a safe and readily accessible cryomilling process toward lithium powders is reported. Nanoscaled lithium powders (<500 nm) are successfully prepared from lithium foils with the assistance of a high‐melting‐point ionic liquid under cryogenic temperature. The prepared lithium powder anode exhibits superior electrochemical properties in symmetric cells, including extraordinarily low yet stable overpotential (≈50 mV), ultrahigh area capacity (30 mAh cm−2), and good long‐term cyclability (1200 h) even cycling at high current density (10 mA cm−2). The powdery form of lithium also functions as a favorable prelithiation reagent for lithium‐free anodes (e.g., Si, SiO, and SnO2). The findings open up a new avenue for the real‐world application of lithium metal anodes for next‐generation lithium batteries.
Nanoscaled Lithium Powders with Protection of Ionic Liquid for Highly Stable Rechargeable Lithium Metal Batteries
Pu, Kaichao (Autor:in) / Qu, Xiaolei (Autor:in) / Zhang, Xin (Autor:in) / Hu, Jianjiang (Autor:in) / Gu, Changdong (Autor:in) / Wu, Yongjun (Autor:in) / Gao, Mingxia (Autor:in) / Pan, Hongge (Autor:in) / Liu, Yongfeng (Autor:in)
Advanced Science ; 6
01.12.2019
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
The Zwitterion Effect in Ionic Liquids: Towards Practical Rechargeable Lithium-Metal Batteries
| British Library Online Contents | 2005
Rocking-Chair or Lithium-Ion Rechargeable Lithium Batteries
| British Library Online Contents | 1994
Nanoscaled Powders for Coatings
| Springer Verlag | 2004
Portable Power: Advanced Rechargeable Lithium Batteries
| British Library Online Contents | 2002
Materials challenges in rechargeable lithium-air batteries
| British Library Online Contents | 2014