Ternary tin-based chalcogenide nanoplates as a promising anode material for lithium-ion batteries
Abstract
As an advanced anode material for lithium-ion batteries, tin-chalcogenides receive substantial attention due to their high lithium-ion storage capacity. Here, tin chalcogenide (SnSe0.5S0.5) nanoplates are synthesized using a facile and quick polyol-method, followed by heating at different temperatures. Results show that the as-prepared of SnSe0.5S0.5 heated at temperature of 180 °C exhibits the best electrochemical performance with an outstanding discharge specific capacity of 1144 mA h g-1 at 0.1 A g-1 after 100 cycles and 682 mA h g-1 at 0.5 A g-1 after 200 cycles with a high coulombic efficiency (CE) of 98.7%. Even at a high current density of 5 A g-1, this anode material delivers a specific capacity of 473 mA h g-1. The high electrochemical performance of SnSe0.5S0.5 is shown by in-situ XRD analysis to originate from an enhanced Li+ intercalation and an alloy conversion process.
- Publication:
-
Journal of Power Sources
- Pub Date:
- March 2018
- DOI:
- 10.1016/j.jpowsour.2018.01.051
- Bibcode:
- 2018JPS...379..182T
- Keywords:
-
- Anode;
- Lithium-ion batteries;
- Tin chalcogenide;
- High electrochemical performance;
- In-situ XRD