Journal
ACS NANO
Volume 15, Issue 12, Pages 20607-20618Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c09402
Keywords
intricate hollow structures; multichambered carbon nanoboxes; selective etching; stepwise carbonization; N/O-doping; room-temperature sodium-sulfur batteries
Categories
Funding
- National Natural Science Foundation of China [U1910210, 51925207, 51872277, 51802302, 52102322, 52072323, 52122211, 52002083]
- Yulin University [2021002]
- Dalian National Laboratory for Clean Energy [2021002]
- Fundamental Research Funds for the Central Universities [WK2060140026, WK3430000006]
- National Key R&D Research Program of China [2018YFA0209600, 2017YFA0208300]
- National Postdoctoral Program for Innovative Talents [BX20200318]
- China Postdoctoral Science Foundation [2020M682031]
- National Synchrotron Radiation Laboratory [KY2060000173, KY2060000199]
Ask authors/readers for more resources
The study presents a facile and efficient strategy for the controllable synthesis of N/O-doped multichambered carbon nanoboxes (MCCBs) by selective etching and stepwise carbonization of ZIF-8 nano-cubes. The multichambered structure of MCCBs as a sulfur host demonstrates better spatial encapsulation, integrated conductivity, high cycle stability, and enhanced rate performance in room-temperature sodium-sulfur batteries.
Intricate hollow carbon structures possess vital function for anchoring polysulfides and enhancing the utilization of sulfur in room-temperature sodium-sulfur batteries. However, their synthesis is extremely challenging due to the complex structure. Here, a facile and efficient strategy is developed for the controllable synthesis of N/O-doped multichambered carbon nanoboxes (MCCBs) by selective etching and stepwise carbonization of ZIF-8 nano-cubes. The MCCBs consist of porous carbon shells on the outside and connected carbon grids with a hollow structure on the inside, bringing about a MCCBs structure. As a sulfur host, the multichambered structure has better spatial encapsulation and integrated conductivity via the inner interconnected carbon grids, which combines the characteristics of short charge transfer path and superb physicochemical adsorption along with mechanical strength. As expected, the S@MCCBs cathode realizes decent cycle stability (0.045% capacity decay per cycle over 800 cycles at 5 A g(-1)) and enhanced rate performance (328 mA h g(-1) at 10 A g(-1)). Furthermore, in situ transmission electron microscopy (TEM) observation confirms the good structural stability of the S@MCCBs during the (de)sodiation process. Our work demonstrates an effective strategy for the rational design and accurate construction of intricate hollow materials for high-performance energy storage systems.
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