Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 26, Pages 22067-22073Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b04170
Keywords
MoS2; carbonized corn stalks; vertical growth structure; long-term cycle life; lithium-ion battery
Funding
- Nature Science Foundation of Qinghai Province [2015-ZJ-930Q]
- Applied Basic Research Program of Qinghai Province [2015-ZJ-740]
- Qinghai Province Science and Technology program [214-ZJ-948]
- National Key Research and Development Program of China [2016YFB0700604]
- Program of National Natural Science Foundation of China [21673008]
- Qinghai Provincial Thousand Talents Program for High-level Innovative Professionals
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In this study, MoS2 nanosheets are vertically grown on the inside and outside surfaces of the carbonized corn stalks (CCS) by a simple hydrothermal reaction. The vertically grown structure can not only improve the transmission rate of Li+ and electrons but also avoid the agglomeration of the nanosheets. Meanwhile, a new approach of biomass source application is presented. We use CCS instead of graphite powders, which can not only avoid the exploitation of graphite resources, but also be used as a matrix for MoS2 growth to prevent the electrode from being further decomposed during long cycles and at high current densities. Meanwhile, lithium-ion batteries show remarkable electrochemical performance. They demonstrate a high specific capacity of 1409.5 mA g(-1) at 100 mA g(-1) in the initial cycle. After 250 cycles, the discharge capacity is still as high as 1230.9 mAh g(-1). Even at 4000 mA g(-1), they show a high specific capacity of 777.7 mAh g(-1). Furthermore, the MoS2/CCS electrodes show long cycle life, and the specific capacity is still up to similar to 500 mAh g(-1) at 5000 mA g(-1) after 1000 cycles.
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