Open AccessLayered Structure Na 2 Ti 3 O 7 as a Promising Anode Material for Sodium‐Ion Batteries
Author(s) -
Pan Jun,
Wang Nana,
Lv Dan,
Dong Wujie,
Yang Jian,
Huang Fuqiang
Publication year - 2021
Publication title -
advanced energy and sustainability research
Language(s) - English
Resource type - Journals
ISSN - 2699-9412
DOI - 10.1002/aesr.202000095
Subject(s) - anode , materials science , battery (electricity) , intercalation (chemistry) , sodium , raw material , lithium (medication) , energy storage , sodium ion battery , electrode , chemical engineering , ion , nanotechnology , inorganic chemistry , chemistry , metallurgy , faraday efficiency , medicine , power (physics) , physics , organic chemistry , quantum mechanics , engineering , endocrinology
Sodium‐ion batteries (SIBs), as next‐generation energy storage devices, can be made by a similar production process to lithium‐ion batteries (LIBs). The key to accelerating their commercialization is to discover appropriate high‐performance electrode materials with low cost, nontoxicity, and simple synthetic features. Herein, layered‐structure Na 2 Ti 3 O 7 , with the advantages of appropriate charge/discharge plateaus, superior stability, environmental friendliness, and ease of preparation using cheap raw materials, is selected for assembly in full‐cell battery packs to evaluate its suitability for practical application. When evaluated in a coin cell, it has a capacity of 77.2 mAh g −1 at 1 A g −1 after 10 000 cycles with capacity retention of 99.9%, demonstrating its excellent stability. In the case of a soft‐pack battery, it retains 22.3 mAh g −1 at 0.1 A g −1 and 18.1 mAh g −1 at 0.05 A g −1 after 50 cycles. After cycling, there is no sodium dendrite formation or active material shedding, further confirming its safety in practical application. Therefore, Na 2 Ti 3 O 7 as another intercalation/deintercalation mechanism material has application potential in the future.