본문 바로가기
HOME> 논문 > 논문 검색상세

학위논문 상세정보

소듐이온전지용 주석전극의 전해질 최적화를 통한 사이클 수명개선 원문보기

  • 저자

    한정희

  • 학위수여기관

    경상대학교 대학원

  • 학위구분

    국내석사

  • 학과

    나노신소재공학과

  • 지도교수

    안효준

  • 발행년도

    2014

  • 총페이지

    vi, 48 p.

  • 키워드

    sodium anode battery electrolyte;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T13534297&outLink=K  

  • 초록

    Abstract Long term cycle of Sn anode for sodium battery by optimizing electrolyte. Han jeong-hui School of Materials Engineering and Convergence Technology Gyeongsang National University Recently, the growing interest in high energy storage device required next generation batteries concepts beyond Li-ion batteries. One of the promising rechargeable battery is Na-ion battery. Although Li-ion batteries have high energy density and good cycle life, they are expensive and resource of lithium is confined to South America. On the contrary, sodium is an earth abundant material and more cost-effective than lithium. Sodium ion batteries have attracted as a possible alternative to Li-ion batteries. Using the sodium metal as the anode material, it is difficult because sodium metal is accompanied by the problem of stability. So, anode materials for Na-ion batteries have been investigated variously, such as hard carbon, alloy, metal oxides, nano-composites. Among these anode materials, Sn is a promising candidate. because of high theoretical capacity 846 mAh/g-Sn or 6164 mAh/cm3. In the previous studies, Yamamoto and Nohira et al. gained the initial reversible capacity as high as 729 mAh/g-Sn. Additionally, Ellis also gained the initial capacity of above 800 mAh/g-Sn. However, in these two papers, capacity was decreased rapidly in initial few cycles. The rapid capacity decrease was attributed to the volume expansion during sodiation/desodiation which might bring about failure for the battery. To solve this problem many researchers used the Sn nanocomposite anodes such as Sn/C and SnSb/C. As the results, cycle performance could be improved by using these materials. But capacity still dropped significantly after fewer than 50 cycles. The other reported techniques are Sn-coated nanoforests, ALD-coated Sn nanoparticles, electrodeposited Sn film on conductive wood fiber and electrolyte addition. These nanostructured Sn improved the cycle performance and have an excellent capacity. However, most of methods have small weight of Sn and difficult to fabricate the electrode. Additionally, using the most similar electrolyte, influence of the electrolyte and sodium salt isn't well known in the field. In this works, we fabricate different type of electrolytes and Sn electrode was made by using the CNT(carbonnanotube) which can provide space for volume expansion sufficiently. This nanostructured Sn-C electrode was also quite straightforward. And then We investigated the electrochemical performance of Na/Sn half cell. And we select optimal electrolyte and confirm the Sn electrode cycleability and high capacity.


 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역