We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Dual‐Insertion Type Sodium‐Ion Full Cell Based on High‐Quality Ternary‐Metal Prussian Blue Analogs.
- Authors
Peng, Jian; Wang, Jinsong; Yi, Haocong; Hu, Wenjing; Yu, Yonghui; Yin, Jinwen; Shen, Yi; Liu, Yi; Luo, Jiahuan; Xu, Yue; Wei, Peng; Li, Yuyu; Jin, Yu; Ding, Yu; Miao, Ling; Jiang, Jianjun; Han, Jiantao; Huang, Yunhui
- Abstract
Abstract: Prussian blue analogs (PBAs) are especially investigated as superior cathodes for sodium‐ion batteries (SIBs) due to high theoretical capacity (≈170 mA h g−1) with 2‐Na storage and low cost. However, PBAs suffer poor cyclability due to irreversible phase transition in deep charge/discharge states. PBAs also suffer low crystallinity, with considerable [Fe(CN)6] vacancies, and coordinated water in crystal frameworks. Presently, a new chelating agent/surfactant coassisted crystallization method is developed to prepare high‐quality (HQ) ternary‐metal Ni<italic>x</italic>Co1−<italic>x</italic>[Fe(CN)6] PBAs. By introducing inactive metal Ni to suppress capacity fading caused by excessive lattice distortion, these PBAs have tunable limits on depth of charge/discharge. HQ‐Ni<italic>x</italic>Co1−<italic>x</italic>[Fe(CN)6] (<italic>x</italic> = 0.3) demonstrates the best reversible Na‐storage behavior with a specific capacity of ≈145 mA h g−1 and a remarkably improved cycle performance, with ≈90% capacity retention over 600 cycles at 5 C. Furthermore, a dual‐insertion full cell on the cathode and NaTi2(PO4)3 anode delivers reversible capacity of ≈110 mA h g−1 at a current rate of 1.0 C without capacity fading over 300 cycles, showing promise as a high‐performance SIB for large‐scale energy‐storage systems. The ultrastable cyclability achieved in the lab and explained herein is far beyond that of any previously reported PBA‐based full cells.
- Subjects
SODIUM ions; LITHIUM-ion batteries; PHASE transitions; CRYSTALLINITY; CATHODE testing; REVERSIBLE phase transitions
- Publication
Advanced Energy Materials, 2018, Vol 8, Issue 11, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201702856