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Citation: Shu Li, Xiaohang Qiu, Yingxia Wang, Fangyi Cheng. A New Journey for Ancient Sulfur: Analysis of Problem 4 of the 54th International Chemistry Olympiad[J]. University Chemistry, ;2022, 37(12): 220906. doi: 10.3866/PKU.DXHX202209063 shu

A New Journey for Ancient Sulfur: Analysis of Problem 4 of the 54th International Chemistry Olympiad

1.
School of Materials Science and Engineering, Nankai University, Tianjin 300350, China;
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College of Chemistry, Nankai University, Tianjin 300071, China;
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College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Corresponding author: Shu Li, shuli@nankai.edu.cn
Received Date: 23 September 2022

Sulfur is an abundant and inexpensive chemical substance. As cathode material for battery, the theoretical specific capacity of sulfur is as high as 1675 mAh∙g⁻¹. Therefore, lithium-sulfur battery is considered to be one of the most promising devices in the field of energy storage in the future. The problem 4 of the 54th International Chemistry Olympiad takes the frontier research of lithium-sulfur batteries as the main line, and guides students to understand the working principle, fascinating application prospect and some scientific challenges for practical applications of lithium-sulfur batteries. The inspection content covers the chemical reactions between lithium and sulfur-containing substance, back titration, chemical equilibrium, electrochemistry, material and charge conservation.
- Lithium sulfur batteries,
- Iodimetry,
- Polysulfuride,
- Chemical equilibrium,
- Hess law
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