Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 32, Pages 36247-36258Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c11678
Keywords
Mn2P nanoparticles; carbon nanosheets; in situ TEM; anode materials; Li-ion batteries
Funding
- National Natural Science Foundation of China [21703185, 51872098, 21805278]
- Leading Project Foundation of Science Department of Fujian Province [2018H0034]
- Shenzhen Science and Technology Planning Project [JCYJ20170818153427106]
- Double-First Class Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University
Ask authors/readers for more resources
Although transition metal phosphide anodes possess high theoretical capacities, their inferior electronic conductivities and drastic volume variations during cycling lead to poor rate capability and rapid capacity fading. To simultaneously overcome these issues, we report a hierarchical heterostructure consisting of isolated Mn2P nanoparticles embedded into nitrogen- and phosphorus-codoped porous carbon nanosheets (denoted as Mn2P@NPC) as a viable anode for lithium-ion batteries (LIBs). The resulting Mn2P@NPC design manifests outstanding electrochemical performances, namely, high reversible capacity (598 mA h g(-1) after 300 cycles at 0.1 A g(-1)), exceptional rate capability (347 mA h g(-1) at 4 A g(-1)) and excellent cycling stability (99% capacity retention at 4 A g(-1) after 2000 cycles). The robust structure stability of Mn2P@NPC electrode during cycling has been revealed by the in situ and ex situ transmission electron microscopy (TEM) characterizations, giving rise to long-term cyclability. Using in situ selected area electron diffraction and ex situ high-resolution TEM studies, we have unraveled the dominant lithium storage mechanism and confirmed that the superior lithium storage performance of Mn2P@ NPC originated from the reversible conversion reaction. Furthermore, the prelithiated Mn2P@NPC parallel to LiFePO4 full cell exhibits impressive rate capability and cycling stability. This work introduces the potential for engineering high-performance anodes for next-generation high-energy-density LIBs.
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