Journal
ADVANCED ENERGY MATERIALS
Volume 12, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202200403
Keywords
confinement; cycling stability; layered heterogeneous structures; self-evolution; sodium-ion batteries; strain engineering
Categories
Funding
- National Natural Science Foundation of China [22075073, 51902347]
- Fundamental Research Funds for the Central Universities [531107051077]
Ask authors/readers for more resources
This study proposes a stable framework with a nest-like structure for rapid and permanent ion insertion/extraction, solving the issue of structural failure caused by uncontrollable structural evolution. It introduces the concept of synchronous self-evolution confinement to control inner strain and alleviate electrode pulverization, resulting in improved electrode stability and structural integrity. The nest-like architecture demonstrates excellent performance as a sodium ion battery anode.
To get a robust architecture for rapid and permanent ion insertion/extraction, various frameworks are constructed, attempting to enhance the high-rate lifespan. However, uncontrollable structural evolution always results in the structural failure derived from the continuous increasing inner strain during the cycling. Herein, inspired by the nest structure, a stable framework with wave-like surface morphology and cross-linked inner configuration is fabricated, which possesses fast ion migration channel and stable structure. Most importantly, the concept of synchronous self-evolution confinement is proposed for high-capacity conversion-type anode materials, which can control the aggregated inner strain and alleviate the inescapable electrode pulverization, thus ensuring the electrode stability and boosting the structure integrity during the repeated cycling. When serving as an anode for sodium ion batteries, the initial nest-like (SnFe)S-2 heterogeneous mildly evolves into a stable architecture with exceptional performance, expressing a prominent rate property (389.4 mA h g(-1) at 30 A g(-1)) and stable durability (627.41 mA h g(-1) at 10 A g(-1) for 800 cycles). Significantly, this route of strain engineering sheds significant light on solving large volume-expansion-type materials for high reversible capacity, especially in the exploration of electrochemical energy storages.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available