Detail publikace

Influence of Organic Binders to the Properties of Lithium-Sulfur Batteries

KAZDA, T. ŠKODA, D. JAŠŠO, K. ČUDEK, P.

Originální název

Influence of Organic Binders to the Properties of Lithium-Sulfur Batteries

Anglický název

Influence of Organic Binders to the Properties of Lithium-Sulfur Batteries

Jazyk

en

Originální abstrakt

Advanced energy storage systems and electric vehicles play an increasingly important role nowadays and their role will be crucial for limitation of CO2 emissions in the future. These applications require higher energy density to cover future requirements such as longer range or more renewable energy stored for longer periods of time. Lithium-sulfur (Li-S) batteries can cover these requirements thanks to their several advantages such as high theoretical energy density (about 3000 Wh/kg), low cost of raw material and low environmental impact. However, Li-S batteries have also many drawbacks such as solubility of polysulfides in the electrolyte during discharging which leads to a decrease of capacity. Another obstacle is about 80% volume expansion of sulfur during cycling. This expansion leads to capacity decrease due to damage to the internal structure of the electrode. Another problem is the insulating nature of sulphur 2. There are several ways how these problems can be fixed. For example, preparation of sulfur-carbone composites, sulfur-graphene composites, sulfur-polymer composites, sulfur-metal oxide composites, porous 3D collectors or modified separators and interlayers. In this work, the optimization of the Li-S electrode stability by means of three types of organic binders is presented. The electrochemical performance of a standard electrode with poly(vinylidenefluoride) binder was compared with the organic binders. It was found that these binders improve the stability of electrode during cycling thanks to improved structural stability of the electrode. They have better binding properties which decrease the amount of binder needed and increase the amount of sulfur in the electrode. Stable capacity of about 1100 mAh/g was achieved during cycling at 0.2 C and it was over 500 mAh/g during cycling at 2 C with sulfur loading of the electrode over 2 mg/cm2.

Anglický abstrakt

Advanced energy storage systems and electric vehicles play an increasingly important role nowadays and their role will be crucial for limitation of CO2 emissions in the future. These applications require higher energy density to cover future requirements such as longer range or more renewable energy stored for longer periods of time. Lithium-sulfur (Li-S) batteries can cover these requirements thanks to their several advantages such as high theoretical energy density (about 3000 Wh/kg), low cost of raw material and low environmental impact. However, Li-S batteries have also many drawbacks such as solubility of polysulfides in the electrolyte during discharging which leads to a decrease of capacity. Another obstacle is about 80% volume expansion of sulfur during cycling. This expansion leads to capacity decrease due to damage to the internal structure of the electrode. Another problem is the insulating nature of sulphur 2. There are several ways how these problems can be fixed. For example, preparation of sulfur-carbone composites, sulfur-graphene composites, sulfur-polymer composites, sulfur-metal oxide composites, porous 3D collectors or modified separators and interlayers. In this work, the optimization of the Li-S electrode stability by means of three types of organic binders is presented. The electrochemical performance of a standard electrode with poly(vinylidenefluoride) binder was compared with the organic binders. It was found that these binders improve the stability of electrode during cycling thanks to improved structural stability of the electrode. They have better binding properties which decrease the amount of binder needed and increase the amount of sulfur in the electrode. Stable capacity of about 1100 mAh/g was achieved during cycling at 0.2 C and it was over 500 mAh/g during cycling at 2 C with sulfur loading of the electrode over 2 mg/cm2.

Dokumenty

BibTex


@misc{BUT167869,
  author="Tomáš {Kazda} and David {Škoda} and Kamil {Jaššo} and Pavel {Čudek}",
  title="Influence of Organic Binders to the Properties of Lithium-Sulfur Batteries",
  annote="Advanced energy storage systems and electric vehicles play an increasingly important role nowadays and their role will be crucial for limitation of CO2 emissions in the future. These applications require higher energy density to cover future requirements such as longer range or more renewable energy stored for longer periods of time. Lithium-sulfur (Li-S) batteries can cover these requirements thanks to their several advantages such as high theoretical energy density (about 3000 Wh/kg), low cost of raw material and low environmental impact. However, Li-S batteries have also many drawbacks such as solubility of polysulfides in the electrolyte during discharging which leads to a decrease of capacity. Another obstacle is about 80% volume expansion of sulfur during cycling. This expansion leads to capacity decrease due to damage to the internal structure of the electrode. Another problem is the insulating nature of sulphur 2. There are several ways how these problems can be fixed. For example, preparation of sulfur-carbone composites, sulfur-graphene composites, sulfur-polymer composites, sulfur-metal oxide composites, porous 3D collectors or modified separators and interlayers. In this work, the optimization of the Li-S electrode stability by means of three types of organic binders is presented. The electrochemical performance of a standard electrode with poly(vinylidenefluoride) binder was compared with the organic binders. It was found that these binders improve the stability of electrode during cycling thanks to improved structural stability of the electrode. They have better binding properties which decrease the amount of binder needed and increase the amount of sulfur in the electrode. Stable capacity of about 1100 mAh/g was achieved during cycling at 0.2 C and it was over 500 mAh/g during cycling at 2 C with sulfur loading of the electrode over 2 mg/cm2.",
  booktitle="ISE 70th Annual Meeting, Durban - Book of Abstracts
",
  chapter="167869",
  edition="70",
  howpublished="online",
  year="2019",
  month="august",
  pages="544--544",
  type="abstract"
}