采用高温固相法合成掺杂改性的NaV1-xCrxPO4F(x=0,0.04,0.08)作为钠离子电池正极材料.通过红外光谱(FT-IR)、X射线衍射(XRD)和扫描电镜(SEM)等对材料的晶体结构和形貌进行表征.从材料的晶体结构、恒流充放电测试和循环性能等方面分析掺杂元素Cr在改善材料性能中的作用.结果表明:掺Cr后的材料电化学循环稳定性得到较好的改善,首次放电容量达到83.3 mA·h/g,效率高达90.3%,循环20次后可逆容量保持率仍然有91.4%.
参考文献
| [1] | 吴振军,陈宗璋,汤宏伟,李素芳.钠离子电池研究进展[J].电池,2002(01):45-47. |
| [2] | D. A. Stevens;J. R. Dahn .High capacity anode materials for rechargeable sodium-ion batteries[J].Journal of the Electrochemical Society,2000(4):1271-1273. |
| [3] | Uebou Y;Okada S;Yamaki J .Electrochemical insertion of lithium and sodium into (MoO2)2P2O7[J].Journal of Power Sources,2003,115:119-124. |
| [4] | P. Thomas;D. Billaud .Electrochemical insertion of sodium into hard carbons[J].Electrochimica Acta,2002(20):3303-3307. |
| [5] | Alcantra R;Jimenez-Mateos J M;Lavela P.Carbon black:a promising electrode materials for sodium-ion batteries[J].Electrochemistry Communications,2001(03):639-642. |
| [6] | J. Barker;M. Y. Saidi;J. L. Swoyer .A Sodium-Ion Cell Based on the Fluorophosphate Compound NaVPO_4F[J].Electrochemical and solid-state letters,2003(1):A1-A4. |
| [7] | Barker J;Saidi M Y;Swoyer J L .A comparative investigation of the Li insertion properties of the novel fluorophosphate phases,NaVPO4F and LiVPO4[J].Journal of the Electrochemical Society,2004,151(10):A1670-A1677. |
| [8] | Barker J;Saidi M Y .Methods of fabricating electrochemical cells[P].US 5871866,1999-02-16. |
| [9] | Barker J;Saidi M Y;Swoyer J .Lithium metal fluorophosphate materials and preparation thereof[P].US 6387568,2002-05-14. |
| [10] | Barker J;Gover R K B;Burns P et al.Hybrid-ion a lithium-ion cell based on a sodium insertion material[J].Electrochemical and Solid-State Letters,2006,9(04):A190-A192. |
| [11] | 唐致远,张娜,卢星河,黄庆华.锂离子电池阴极材料LiMn2-xZrxO4的性能表征[J].物理化学学报,2005(01):89-92. |
| [12] | 文衍宣,郑绵平,童张法,粟海锋,薛敏华.镍离子掺杂对LiFePO4结构和性能的影响[J].中国有色金属学报,2005(09):1436-1440. |
| [13] | 闻辂.矿物红外光谱学[M].重庆:重庆大学出版社,1989:65-68. |
| [14] | Dong, WS;Bartley, JK;Song, NX;Hutchings, GJ .Synthesis and characterization of vanadyl hydrogen phosphite hydrate[J].Chemistry of Materials,2005(10):2757-2764. |
| [15] | Meins J;Crosnier M;Hemon A .Phase transitions in the Na3M2 (PO4)2F3 family (M=Al3+,V3+,Cr3+,Fe3+,Ga3+):Synthesis thermal structural and magnetic studies[J].Journal of Solid State Chemistry,1999,148:260-277. |
| [16] | Alda E;Bazan B;Mesa J L et al.A new vanadium (Ⅲ) fluorophosphates with ferromagnetic interactions,(NH4)[V(PO4) F][J].Journal of Solid State Chemistry,2003,173:101-108. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%