Development of Nanomaterials for High-Performance energy storage technology
- Publication Type:
- Thesis
- Issue Date:
- 2021
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Entering the 21st century, with the continuous energy crisis and the aggravation of environmental pollution, energy storage technologies of renewable energy has become the focus of whole human society. Compared with other energy storage systems, lithium-sulfur (Li-S) batteries have been regarded as one of the most promising systems for next-generation rechargeable batteries owing to their high energy density and low cost. However, both cathode and anode materials encounter serious bottleneck defects in practical applications. For cathode materials, the “Shuttle effect” and the loss of cathode active materials caused by volumetric expansion during cycling are often considered as the main reasons for the energy decline of lithium sulfur batteries. For anode materials, the failure to inhibit the growth of lithium dendrite often leads to the internal short circuit of the battery, resulting in the serious thermal runaway of the battery. At the same time, the rapid development of nanotechnology has brought technological breakthroughs to various scientific fields. In this thesis, some latest nanotechnologies which have been systematically applied for largely improving the electrochemical performances of lithium sulfur batteries have been reviewed. Moreover, we rationally designed some strategies to alleviate the negative effects from “Shuttle effects” and suppress the growth of lithium dendrites. The usage of nanotechnologies can effectively enhance discharge capacity, improve cycling stability and increase the safety of high energy density lithium sulfur batteries. This thesis may provide an insight into the development of nanotechnologies for large scale energy storage.
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