Your browser doesn't support javascript.
loading
Lithiated Prussian blue analogues as positive electrode active materials for stable non-aqueous lithium-ion batteries.
Zhang, Ziheng; Avdeev, Maxim; Chen, Huaican; Yin, Wen; Kan, Wang Hay; He, Guang.
Afiliación
  • Zhang Z; Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
  • Avdeev M; Renewable Energy Conversion and Storage Center (RECAST), Haihe Laboratory of Sustainable Chemical Transformations, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
  • Chen H; Australian Nuclear Science and Technology Organization (ANSTO), Lucas Heights, NSW, 2234, Australia.
  • Yin W; Spallation Neutron Source Science Center, Dalang, Dongguan, 523803, China.
  • Kan WH; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
  • He G; Spallation Neutron Source Science Center, Dalang, Dongguan, 523803, China.
Nat Commun ; 13(1): 7790, 2022 Dec 16.
Article en En | MEDLINE | ID: mdl-36526618
ABSTRACT
Prussian blue analogues (PBAs) are appealing active materials for post-lithium electrochemical energy storage. However, PBAs are not generally suitable for non-aqueous Li-ion storage due to their instability upon prolonged cycling. Herein, we assess the feasibility of PBAs with various lithium content for non-aqueous Li-ion storage. We determine the crystal structure of the lithiated PBAs via neutron powder diffraction measurements and investigate the influence of water on structural stability and Li-ion migration through operando X-ray diffraction measurements and bond valence simulations. Furthermore, we demonstrate that a positive electrode containing Li2-xFeFe(CN)6⋅nH2O (0 ≤ x ≤ 2) active material coupled with a Li metal electrode and a LiPF6-containing organic-based electrolyte in coin cell configuration delivers an initial discharge capacity of 142 mAh g-1 at 19 mA g-1 and a discharge capacity retention of 80.7% after 1000 cycles at 1.9 A g-1. By replacing the lithium metal with a graphite-based negative electrode, we also report a coin cell capable of cycling for more than 370 cycles at 190 mA g-1 with a stable discharge capacity of about 105 mAh g-1 and a discharge capacity retention of 98% at 25 °C.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2022 Tipo del documento: Article País de afiliación: China
...