摘要
采用水热电沉积法在泡沫镍基体上原位沉积Co_9S_8薄膜,并对其形貌、组成、结构和电化学性能进行表征和测试。结果表明,镍基Co_9S_8薄膜呈花瓣片状,并具有优异的电化学性能,其在电流密度为10mA/cm~2时,比电容可高达2538.7 F/g。即使电流密度扩大至50 mA/cm~2时,比电容依然可达1930.7 F/g。经过1000次循环(电流密度为20 mA/cm2),比电容仍可达为1825.2 F/g,电容保有率72.8%,经过1500次循环后,电容保有率61.4%。
A Co_9S_8 film was in-situ deposited onto nickel foam substrate by a hydrothermal electrochemical deposition method.The morphology,composition and structure of the as-prepared film were characterized and the electrochemical performances were tested.The result show that the as-synthesized Co_9S_8 film displays a petal-like morphology and possesses excellent capacitive behavior with a specific capacitance of 2538.7 F/g at a discharge current density of 10 mA/cm~2,which remains to be 1930.7 F/g even at a higher density of 50mA/cm~2.After 1000 cycles at 20 mA/cm~2,a specific capacitance of 1825.2 F/g still remains,and the capacitance retention is calculated to be 72.8%.Even after 1500 cycles,a specific capacitance retention of 61.4%can be retained.
引文
[1] Lin J Y, Chou S W. RSC Advances[J], 2013, 3(6):2043
[2] Wang T, Zhao B, Jiang H et al. Journal of Materials Chemistry A[J],2015,3(45):23 035
[3] Zhu T. Wang Z Y, Ding S J et al. RSC Advances[J], 2011, 1(3):397
[4] Nitesh K, Natarajan R, Athinarayanan S. Zeitschrift Fur Anorganische and Allgemeine Chemie[J], 2014, 640(6):1069
[5] Pu J, Wang Z H, Wu K L et al. Physical Chemistry Chemical Physics[J], 2014, 16(2):785
[6] Yin L,Wang L Q, Liu X H et al. European Journal of Inorganic Chemistry[J],2015, 2015(14):2457
[7] Rakhi R B, Alhebshi N A, Anjum D H et al. Journal of Materials Chemistry A[J], 2014, 2(38):16 190
[8] Zhang Z M, Wang Q, Zhao C J et al. ACS Applied Materials&Interfaces[J], 2015, 7(8):4861
[9] Wen J, Li S Z, Li B R et al. Journal of Power Sources[J], 2015,284:279
[10] Liang Chih-Hsiang, Hwang Chii-Shyang. Japanese Journal of Applied Physics[J], 2008, 47(3):1662
[11] Yu J W, Wan H Z, Jiang J J et al. Journal of the Electrochemical Society[J], 2014, 161(6):A996
[12] Yin P F, Sun L L, Han X Y et al. Rare Metal Materials and Engineering[J], 2016, 45(7):1700
[13] Tang Y F, Chen T, Yu S X et al. Journal of Power Sources[J],2015,295:314
[14] Li C C, Yin X M, Wang T H et al. Chemistry of Materials[J],2009, 21(20):4984
[15] Yu R T, Liao R H, Cheng L B et al. Fresenius Environmental Bulletin[J], 2016, 25(8):3142
[16] Li Y, Liu S T, Chen W et al. Journal of Alloys and Compounds[J], 2017, 712:139
[17] Li H, Gao Y H, Shao Y D et al. Nano Letters[J], 2015, 15(10):6689
[18] Gong X F, Cheng J P, Ma K Y et al. Materials Chemistry and Physics[J], 2016, 173:317
[19] Wang X H, Gao J, Wu X X et al. RSC Advances[J], 2016,6(59):54 142
[20] Wang Y P, Zhu T, Zhang Y F et al. Journal of Materials Chemistry A[J], 2017, 5(35):18448
[21] Zhang S, Li D H, Chen S et al. Journal of Materials Chemistry A[J], 2017, 5(24):12453
[22] Zhang L P, Wang Y R, Zhou W et al. International Journal of Electrochemical Science[J], 2016, 11:1541
[23] Masikhwa T M, Madito M J, Bello A et al. RSC Advances[J],2017, 7(33):20 231
[24] Ramachandran R, Saranya M, Santhosh C et al. RSC Advances[J],2014, 4(40):21151
[25] Lin T W, Dai C S, Tasi T T et al. Chemical Engineering Journal[J], 2015, 279:241