NiO : O 646; TM 911 : A. ( Supercapacitor), ( PTFE) RuO 2 IrO 2 MnO 2 N io CoO V 2 O 5 SnO 2. mol L g ml - 1, h.

Transcription

1 ELECTROCHEM ISTRY Vol. 12 No. 3 Aug : (2006) NiO 1, 3 1, 1, 1, 1, 2 (1., ; 2., ) : Y N io. XRD, Y N io,. Y2N io 5 mol L - 1 KOH.,, N io Y 2 O , 363 F g - 1, , Y,,. : ; ; ; : O 646; TM 911 : A ( Supercapacitor),, [ 1 ]., [ 2 ]., RuO 2 IrO 2 MnO 2 N io CoO V 2 O 5 SnO 2 [ 327 ].,,,,,,., N io [ 829 ],,, ( ph ) ( ), N io [ ]., [ ],., ( 6000), ( PTFE) mol L - 1, mol L - 1, 0. 1 mol L - 1., 0. 4 g ml - 1, 50,, 3 h, 12 h, 80., h XRD D /Max2 A X ( ), K, nm, 40 kv, 20 ma, 0. 1 ( ) s 1, N io ( PTFE) : , : , Tel: , E2mail: chenye@ hrbeu. edu. cn ( )

2 (70 15 l0 5),,,, ( 1 cm 2 ), ( 4 cm 2 ), ( SCE), 5 mol L - 1 KOH, KCl, Im6eX ( ZAHNER Elektrik ) X 1 Y N io XRD. Y, ( ) ( a),, JCPDS( ), Y N io,, Y, Y,, Y,,. 1,,,, [ 15 ],. 1 Y N io XRD Fig. 1 XRD patterns of the N io with different yttrium2 doped contents Y/N ic ratio: a) 0, b) 0. 01, c) 0. 05, d) 0. 1, e) 0. 15, f) ) 2 Y N io 5 mol L - 1 KOH, 10 mv s - 1., V, I E,. 2 N io Fig. 2 Cyclic voltammograns of the Y2doped N io electrode scan rate: 10 mv s - 1 Venkat [ 16 ], : N io + zoh - zn iooh + (1 - z) N io + ze - (1), N io N i e - N i 3 +, 2, V V,. Y V, Y. C = I/V,, C E. 3 Y 10% N io C E,,,,,,,. 2) 4 Y,

3 3 : N io Y 10% N io Fig. 3 C E curves of the Y =N00 (10% ) coiposita elec2 trode with different scm rate 4 Y N io Fig. 4 The impedance curves of Y doped N io Yttriom 2doped com tent/% a) 20, b) 1, c) 5, d) 10, e) 15, f) 0, W arburg., Y, Y,.,,, Y,, Y N io,,, [ 17 ]. 3) 5 Y 10% N io.,,. 5mA 20mA F g F g - 1,,,,, [ 18 ]., 5 ma cm - 2, Y 10%, 2. 02, Y,, OH - N io,, [ 19 ]. 3, 5 Y2N io (0. 1 1) ( a) ( b) Fig. 5 Charge ( a) and discharge ( b) curves of the Y2N io (10% ) composite electrode under different working currents

4 N io,, Y 10%, 2. 02, Y. (R efe rence s) : [ 1 ] Conway B E. Transition from suppercapacitor to bat2 tery behavior in electrochem ical energy storage [ J ]. Journal of Electrochem ical Society, 1991, 138 ( 6) : [ 2 ] Sarangpani S, Tilak B V, Chen C P. Materials for elec2 trochem ical capacitors [ J ]. Journal of Electrochem ical Society, 1996, 143 (11) : [ 3 ] Zhang L i ( ), Song J in2yan ( ), Zou J i2yan ( ). RuO 2 xh 2 O /AC composite electrode and p roperties of supercapacitors [ J ]. Journal of Inorganic Materials ( in Chinese), 2005, 20 (3) : [ 4 ] W inny Dong, Jeffrey S, Sakamoto B ruce Dunm. Electro2 chem ical p roperties of vanadium oxide aerogels[ J ]. Sci2 ence and Technology of AdancedMaterials, 2003, 4 (1) : [ 5 ] Yoshikazu Kuzuoka, W en Ching2ju, Junichiro O tomo, et al. Characterisitics of MnO x electrochem ical capacitors with solid electrolyte ( CsHSO 4 ) operatedat elevated temperature[ J ]. Solide State Ionics, 2004, 175 ( 4) : [ 6 ] Anne C Co1, L iu J ing2bo, Irina Serebrennikova, et al. Structural and electrochem ical studies of Co oxide film s formed by the sol2gel technique[ J ]. Journal ofmaterials Science, 2005, 40 (15) : [ 7 ] W ang Chen2ching, Hu Chi2chang. Electrochem ical and texture characterization of binary Ru2Sn oxides synthe2 sized under m ild hydrithermal conditions for supercapac2 itors [ J ]. Electrochim ica Acta, 2005, 50 ( 13) : [ 8 ] Zhang Fei2bao, Zhou Ying2ke, L i Hu2lin. Nanocrystalline N io as an electrode material for electrochem ical capaci2 tor[ J ]. Material Chem istry and Physics 2004, 83 ( 2) : [ 9 ] Xing W ei, L i Feng, Yan Zi2feng, et al. Synthesis and electrochem ical p roperties of mesoporous nickel oxide [ J ]. Journal of Power Sources, 2004, 134 ( 2 ) : [ 10 ] L iu Sheng2Feng ( ),W u Chun2Yan ( ), Han Xiao2Zhao ( ). Preparation of nanoscale N io powders by polymer2network gel p rocess[ J ]. Jour2 nal of Inorganic Chem istry ( in Chinese ), 2003, 19 (6) : [ 11 ] L i Xiang, Yu Deng, Yu J in. Experimental study on syn2 thesis of N io nano particles [ J ]. Scrip ta Materialia, 2002, 47 (4) : [ 12 ] W ang Xiao2feng ( ), Ruan D ian2bo ( ), L iang J i ( ). Pseudocapacitive behavior of nickel oxide / carbon nanotubes composite p repared by cathod2 ic deposition[ J ]. Journal of chem ical Physics ( in Chi2 nese) 2005, 18 (3) : [ 13 ] L iu Xian2m ing, Zhang Xing2guo. N io2based composite electrode with Ru2O 2 for eletrochem ical cpacitors[ J ]. Electrochim ica Acta, 2004, 49 (2) : [ 14 ] Zhang Chuan2fu, Zhan J ing, W u J ian2jun, et al. Pre2 paration of fibrous nickel oxide particles[ J ]. Transac2 tions of Nonferrous Metals Society of China, 2003, 13 (6) : [ 15 ] Yu Dan2mei ( ), Chen Chuang2guo ( ), Zhou Shang2qi( ). Modification study of nano2 N i(oh ) 2 doped copper [ J ]. Battery ( in Chinese), 2005, 35 (2) : [ 16 ] Venkat S, John W. Studies on the capacitance of nick2 el oxide film: effect of heating tempertature and electro2 lyte concentration[ J ]. Journal of Electrochem ical Soci2 ety, 2000, 147 (3) : [ 17 ] L iu Xian2m ing( ), Zhang Xiao2gang( ), Bao Shu2juan ( ). Study on capacitance perform2 ance of MnO 2 electrodes chem ically doped with Co 3 + [ J ]. Journal of Functional Materials and Devices ( in Chinese), 2003, 9 (3) : [ 18 ] Chen Ye ( ), Zhang M i2lin ( ), Han Ying ( ). Research on Supercapacitors with Lanthanum oxide2dop ingmno 2 electrode[ J ]. Journal of Rare Met2 als ( in Chinese), 2005, 29 (1) : [ 19 ] Zhang Xiao2gang( ), L iu Xian2m ing( ), Bao Shu2juan ( ). Dop ing of N i ions on the elec2 trochem ical capacitance of CoA l layered double hydrox2 ides[ J ]. Journal of Inorganic Chem istry ( in Chinese), 2004, 20 (1) :

5 3 : N io 337 Preparation and Supercapacitor Properties of Y ttrium Doped NiO HAN Dan2dan 1, CHEN Ye 3 1, ZHANG M i2lin 1, SHU Chang 1, ZHANG Chun2xia 1, XU Peng2cheng 2 (1. School of Chem ica l Engineering, Harbin Engineering U n iversity, Harbin , Heilongjiang, China, 2. J ilin Institute of Chem ical Technology, J ilin , J ilin, China) Ab s tra c t: Yttrium doped Nano2N io were synthesized by chem ical p recip itation m ethod. Characterization and perform ance of the samp les were studied by X2ray diffraction, the results showed that the dop ing Yttrium did not change the crystal structure of N io, but the size of crystalline grain was reduced. of the electrode materials were m easured in the three electrode system. The electrochem ical p roperties Electrochem ical p roperties of N io were researched by cyclic voltammetry, constant current charge / discharge and AC impedance m ethods. It could be seen that the chem ical dop ing imp roved the specific capacitance and the utilization of active materials. W hen the weight ratio of N io with Y 2 O 3 was , the composite material had the best p roperties. The maximum dis2 charge specific capacitance was 363F g - 1 in the 5 mol L - 1 KOH solution. The result of AC impedance showed that the dop ing could imp rove the electrochem ical reversibility, reduce the resistance of cations transfered be2 tween the electrode and electrolyte which made the electrodes show the better capacitive behavior. Ke y wo rd s: Supercapacitor, N ickel oxide, Yttrium, Dop ing