Related Experiment Video
Updated: Jan 24, 2026
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
26.0K
Bacteria-Derived Biological Carbon Building Robust Li-S Batteries
Tao Wang1,2, Jian Zhu3, Zengxi Wei1
1School of Physics and Electronics , Hunan University , Changsha 410082 , People's Republic of China.
Nano Letters
|June 1, 2019
Summary
Researchers developed a novel composite cathode material for lithium-sulfur (Li-S) batteries. This material effectively suppresses polysulfide shuttling, leading to significantly improved battery stability and capacity retention for high-density energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-sulfur (Li-S) batteries offer high energy density potential.
- Capacity fading due to polysulfide shuttling hinders practical Li-S battery application.
Purpose of the Study:
- To develop a composite cathode material that enhances Li-S battery performance by addressing polysulfide issues.
- To improve cycling stability and specific capacity in Li-S batteries.
Main Methods:
- Fabrication of a hierarchical composite (GOC@NPBCS) using graphene, PEDOT, and N, P-codoped biological carbon.
- Encapsulation of sulfur species within the composite structure.
- Electrochemical testing of the GOC@NPBCS cathode in Li-S batteries.
Main Results:
- The GOC@NPBCS cathode demonstrated exceptional cycling stability with an ultralow capacity fading rate of 0.045% per cycle over 1000 cycles at 5 C.
- Achieved a high specific capacity of 1193.8 mAh g-1 at 0.5 C (sulfur weight).
- Exhibited excellent rate capability and suppressed polysulfide dissolution and shuttling.
Conclusions:
- The hierarchical composite structure with triple protection effectively immobilizes sulfur species and enhances conductivity.
- N, P-codoped biological carbon shows strong polysulfide absorption, mitigating capacity fading.
- The developed GOC@NPBCS cathode shows significant promise for advanced high-density energy storage applications.
Related Concept Videos
03:12Batteries and Fuel Cells
30.8K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.8K
01:14The Carbon Cycle
43.3K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.3K
01:57What is Conservation Biology?
24.0K
Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
24.0K
01:21DC Battery
1.2K
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
1.2K
01:12Carbon Skeletons
114.5K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
114.5K
02:11The Roles of Bacteria and Fungi in Plant Nutrition
47.2K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
47.2K