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1 EL ECTROCHEMISTR Y Vol 6 No 1 Feb 2000 : (2000) , 3,,, (, ) : PbCO 3,, 2 0 ma/ cm 2,, 74 4 % ;, 2 0 ma/ cm 2, 90 % :,, : TM : A,,, [1 ( ] ), [2,3 ],, PbCO 3, 300, 50 m ; PbO BaSO 4 ; ED TA ; PTFE 60 % mm Pb- Sb, 1 mm,, 5 5 g PbCO 3, 0 5 % BaSO % 0 2 %, 2 4 ml 8 0 mol/ L H 2 SO ml PTFE, 30 min : , : : ( ) China Academic Journal Electronic Publishing House All rights reserved

2 g PbCO ml 8 0 mol/ L H 2 SO ml PTFE, 12 h, h, 1 0 mol/ L H 2 SO 4,, 2 65V ( vs CdSO 4 / Cd), 2 h,, V 2 h,,, Pb,CdSO 4 / Cd 5 0 mol/ L H 2 SO 4, 1 3 XRD XRD D/ Max- RA 12 kw X-,X Cu K, = , 40 kv, 50 ma 1 4,, EB T, ED TA, Faraday PbCO 3 Q t 24 6 mah 23 8 mah PbO 44 4 mah 43 2 mah mol/ L H 2 SO 4, ( 2 0 ma/ cm 2 ) (10 0 ma/ cm 2 ), 5 0 mol/ L H 2 SO 4 1 PbCO 3 ( PbCO 3 ), 15 min 2 22 V,, 1100 min, ma/ cm 2 PbCO 3 PbO 2, ( i d = 2 0 ma/ cm 2 ) Q d Fig 1 The discharge curve of PbCO 3 -type positive electrode 18 3 mah, 74 4 % formed in 2 0 ma/ cm 2 ( i d = 2 0 ma/ cm 2 ) China Academic Journal Electronic Publishing House All rights reserved

3 1 : 97 1, f,c d PbO ( PbO ),,, [4,, ],,, PbSO 4 PbO 2, PbO 2 Pb- Sb, PbO 2,,PbO 2 [5 ] 1, PbCO 3, PbO 1 PbCO 3 Tab 1 The charge/ discharge parameters of the PbCO 3 -type positive electrodes formed by constant current i f / ma cm - 2 i c / ma cm - 2 i d / ma cm - 2 Q c / ma h Q d / ma h ( Q d / Q t ) / % The electrode is prepared by PbO X-, 2 X-, PbSO 4,, PbO 2 0 ma/ cm 2 PbO 2, - PbO 2, PbSO 4, 10 0 ma/ cm 2-2 PbCO 3 XRD Fig 2 X- ray diffraction patterns of PbCO 3 -type positive electrode before (a) PbO 2, PbSO 4 and after formatin in (b) 2 0 ma/ cm 2 and in (c) 10 0 ma/ cm, PbO China Academic Journal Electronic Publishing House All rights reserved

4 , PbSO 4 PbO 2, mol/ L H 2 SO 4 (1 0 ma/ cm 2 ) ( t c / T m = 0 83, i c = 2 0 ma/ cm 2, i a = 1 0 ma/ cm 2, t c, T m, i c i a ) Pb2 CO ma/ cm 2 3, 2 min 0 14 V, 400 min, 3 PbCO 3 ( i d = 2 0,, ma/ cm 2 ) min, Fig 3 The discharge curve of PbCO 3 -type negative electrode formed 3 by unsymmetrical square wave ( i d = 2 0 ma/ cm 2 ) 21 7 mah, 91 2 %, 2 PbO, PbCO ma/ cm 2,,, PbCO 3 [3 ], PbO [3, ] 5 0 ma/ cm 2 PbO PbCO 3, PbCO 3, [5 ],,, XRD, 2 2 PbCO 3 Tab 2 The charge/ discharge parameters of the PbCO 3 -type negative electrodes formed by various methods i f / ma cm - 2 i c / ma cm - 2 i d / ma cm - 2 Q c / ma h Q d / ma h ( Q d / Q t ) / % [ ]25 2 i c = 2 0/ i a = The electrode is prepared by PbO China Academic Journal Electronic Publishing House All rights reserved

5 1 : 99, PbCO 3 PbSO 4,,, H 2 SO 4, 90 % PbCO 3 PbSO 4, mol/ L H 2 SO 4 ( ), 3,, PbCO 3 CO 2,, [4,, ] 3 PbCO 3 Tab 3 The charge/ discharge parameters of the PbCO 3 -type negative electrodes formed by unsymmetrical square wave i c / ma cm - 2 i d / ma cm - 2 Q c / ma h Q d / ma h ( Q d / Q t ) / % PbCO 3,,, 5 0 mol/ L H 2 SO 4, 4,, 4 0 ma/ cm 2, V 550 min, 18 3 mah, 4, CdSO 4 / Cd Fig 4 The discharge curve of the PbCO 3 -type prototype of lead-, acid battery,, China Academic Journal Electronic Publishing House All rights reserved

6 PbCO 3 H 2 SO 4 PTFE PbCO 3 BaSO 4 H 2 SO 4 PTFE,,, 2 0 ma/ cm 2,, 74 4 %,, 2 0 ma/ cm 2, 90 %, 4 0 ma/ cm 2, V Studies of t he Preparation of Electrodes from Lead Carbonate for Lead-acid Battery The Preparation of Paste Electrodes DAI Zhong- xu, WAN G Di- hua 3, KE Hao- hao,zou Jin-yun, ZHOU Yun- hong ( Dept of Chem, Faculty of Chem and Envi ronmental Science, W uhan U niv, W uhan , China) Abstract : The positive and negative pastes were prepared by mixing PbCO 3 and H 2 SO 4 so2 lution as well as relative additives, respectively The effect s of t he various formation met hods and t he charge/ discharge conditions on discharge capacity and active material utilization of bot h elec2 trodes were examined The results indicate that the performance of the positive electrode formed at 2 0 ma/ cm 2 is better than that formed at higher current density under the same charge/ dis2 charge condition, the PAM utilization reaches 74 4 % under discharging at 2 0 ma/ cm 2 ; and the property of the negative electrode formed by unsymmetrical square wave is superior to that formed by constant current when using the same density, the AM utilization of the former is more than 90 % under discharging at 2 0 ma/ cm 2 Moreover, the discharge behavior of a lead/ acid battery composed of t he above positive and negative elect rodes was discussed Key words : Lead carbonate, Lead/ acid battery, Paste elect rodes, Preparation China Academic Journal Electronic Publishing House All rights reserved

7 1 : 101 Reference s : [1 ] Lu Keyuan, Yu Hong, An Zhentao, Chen Jiayong A nwe approach to lead hydrometallugy[j ] Progress in Chemistry, 1998, 10 (3) :344 [2 ] Dai Zhongxu, Wang Dihua, Zou Jinyun, Zhou Yunhong A study on lead carbonate as electrode materials of lead- acid battery[j ] Environmental Science, 1999,20(3) :55 [3 ] Dai Zhongxu, Wang Dihua, Jiang J unwei Zhou Yunhong and Zou Jinyun, Studies of the preparation of clec2 trodes from lead carbouate for lead- acid battery I the activation of electrodes[j ] Electrochemistry(Chineses), 1999, 5 (4) :437 [4 ] Xu Pindi, Liu Houtian Lead-acid batteries- Fundamental theory and technical principle[ M ] Shanghai :Shang2 hai Science and Technique Literature Press,1996, [5 ] Lu Mingxiang et al Chemical power Sources[ M ] Tianjin : Tianjin University Press, 1992, China Academic Journal Electronic Publishing House All rights reserved

: : O : A. ; 8511A TOL EDO 320 p H. A. R. Vol. 7 No. 3 Aug EL ECTROCHEMISTR Y : (2001) (1.

: : O : A. ; 8511A TOL EDO 320 p H. A. R. Vol. 7 No. 3 Aug EL ECTROCHEMISTR Y : (2001) (1. 7 3 2001 8 EL ECTROCHEMISTR Y Vol 7 No 3 Aug 2001 :1006-3471 (2001) 03-0339- 06 1 3, 2 1 3, (1 361005 ; 2, 530006 ;3, 361005) : Au( ) Cu( ), Au ( ) Cu ( ) Au( ) Cu( ), Au ( ) 0 2 1 g/ ml Cu( ) 2 10 ng/