Park, C.K.
(Advanced Battery Center, Korea Institute of Science and Technology)
,
Park, S.B.
(Advanced Battery Center, Korea Institute of Science and Technology)
,
Lee, S.Y.
(Advanced Battery Center, Korea Institute of Science and Technology)
,
Lee, H.
(Clean Energy Center, Korea Institute of Science and Technology)
,
Jang, H.
(Department of Materials Science and Engineering, Korea University)
,
Cho, W.I.
(Advanced Battery Center, Korea Institute of Science and Technology)
This study investigates the requirements of lithium-air cathodes, which directly influence discharge capacity. The cathodes of Li-air cell are made by using five different carbon materials, such as Ketjen black EC600JD, Super P, Ketjen black EC300JD, Denka black, and Ensaco 250G. The Ketjen black EC...
This study investigates the requirements of lithium-air cathodes, which directly influence discharge capacity. The cathodes of Li-air cell are made by using five different carbon materials, such as Ketjen black EC600JD, Super P, Ketjen black EC300JD, Denka black, and Ensaco 250G. The Ketjen black EC600JD provides discharge capacity of 2600 mAh/g per carbon weight, while that of Ensaco 250G shows only 579 mAh/g. To figure out the differences of discharge capacity from carbon materials, their surface area and pore volume are analyzed. These are found out to be the critical factors in determining discharge capacity. Furthermore, carbon loading on Ni foam and amounts of electrolyte are significant factors that affect discharge capacity. In order to investigate catalyst effect, electrolytic manganese dioxide (EMD) is incorporated and delivered 4307 mAh/g per carbon weight. This infers that EMD facilitates to break $O_2$ interactions and leads to enhance discharge capacity.
This study investigates the requirements of lithium-air cathodes, which directly influence discharge capacity. The cathodes of Li-air cell are made by using five different carbon materials, such as Ketjen black EC600JD, Super P, Ketjen black EC300JD, Denka black, and Ensaco 250G. The Ketjen black EC600JD provides discharge capacity of 2600 mAh/g per carbon weight, while that of Ensaco 250G shows only 579 mAh/g. To figure out the differences of discharge capacity from carbon materials, their surface area and pore volume are analyzed. These are found out to be the critical factors in determining discharge capacity. Furthermore, carbon loading on Ni foam and amounts of electrolyte are significant factors that affect discharge capacity. In order to investigate catalyst effect, electrolytic manganese dioxide (EMD) is incorporated and delivered 4307 mAh/g per carbon weight. This infers that EMD facilitates to break $O_2$ interactions and leads to enhance discharge capacity.
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문제 정의
Therefore, the main focus of this study is the requirements of cathode, which could influence the discharge capacity of lithium-air battery. Ketjen black EC600JD, Super P, Ketjen black EC300JD, Denka black, and Ensaco 250G are used as carbon materials to fabricate the air cathode.
가설 설정
(2) A proper carbon loading on nickel foam is important in determining discharge capacity because enough pore volume and open structure of nickel foam are required to acquire the high discharge capacity. (3) Adequate amount of electrolyte-filling is required to deliver high discharge capacity. The cell that contains insufficient electrolyte and surplus electrolyte hinder further oxygen intake due to excessively deposited Li2O and Li2O2 on cathode and full wet of the carbon material, respectively.
제안 방법
Only the weight of carbon is considered and weights of the Ni foam and PVDF are not included. To clarify the differences of discharge capacities obtained from the five different carbon materials, surface area and pore volume of each carbon material were analyzed by Brunauer-EmmettTeller (Table 1). While the low surface areas of the Super P, Denka black, and Ensaco 250G result in low discharge capacity, the high surface areas of the Ketjen black EC600JD and Ketjen black EC300JD lead to high discharge capacity.
대상 데이터
6 mg as shown in Figure 2. The Ketjen black EC600JD is used as carbon material. The 5.
참고문헌 (10)
Abraham, K. M.; Jiang, Z. J. Electrochem. Soc. 1996, 143, 1.
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