| 학회 | 한국화학공학회 |
| 학술대회 | 2017년 가을 (10/25 ~ 10/27, 대전컨벤션센터) |
| 권호 | 23권 2호, p.2393 |
| 발표분야 | [특별 심포지엄](한국화학공학회-대만화학공학회 공동 국제 심포지엄(국제화 국제협력위원회) |
| 제목 | Synthesis and Modification of Na 3 V 2 (PO 4 ) 3 Cathode Materials for Sodium-Ion Batteries |
| 초록 | In this talk, I would like to repost a series of Na3-xV2(PO4-xFx)3 (x=0, 0.1, 0.15 and 0.3) polyanion cathode materials synthesized via a sol-gel method for Na ion batteries. The optimal doping concentration of F in Na3V2(PO4) is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na2.85V2(PO3.95F0.05)3. The half-cell of Na2.85V2(PO3.95F0.05)3 cathode exhibits a stable discharge capacity of 103 mAh g-1 and 93 % of capacity retention over 250 cycles without decay at 0.1 A g-1, which is higher than that of bare Na3V2(PO4)3 (98 mAh g-1). The high rate capability of Na2.85V2(PO3.95F0.05)3 is also dramatically enhanced via increase the conductivity of host material by F-doping. These results demonstrate that the optimal amount of Na2.85V2(PO3.95F0.05)3 is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications. |
| 저자 | Wei-Ren Liu |
| 소속 | Department of Chemical Engineering |
| 키워드 | |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
