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The Study on Electrodeposit Rules of Cathode Current Collectors of Alkaline Batteries and Its Electrochemical Capability

Author: LiJunHua
Tutor: FeiXiMing
School: Central China Normal University
Course: Physical and chemical
Keywords: Alkaline batteries Mercury Electrodeposition Electrochemical Sn-In Electrode Collector
CLC: O646.2
Type: Master's thesis
Year: 2006
Downloads: 152
Quote: 1
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Abstract

Zinc rich in resources, inexpensive, low toxicity, easy to deal with it in alkaline manganese batteries using zinc as the anode material: But in the course of the zinc electrode exists prone dendrites, deformation, corrosion, so that hydrogen is easy to set the negative precipitated on the fluid, causing the battery flatulence, leaking storage and shorten the battery life; previously to solve these problems are in the negative electrode material to add mercury and mercury oxide. But mercury harmful to humans and the environment, were developed in different countries have laws and regulations restrict the use of mercury. Currently, the growing use of the alkaline battery case, the mercury cell research is particularly important; battery is a negative electrode current collector electrically conductive material, this deposition method using electric battery collector fluid preparation of several high hydrogen on behalf of mercury electrode electrochemical method influences of different additives, different process conditions on the hydrogen electrode preparation of high impact and high hydrogen electrodes in alkaline electrochemical properties, mainly experiments and results are as follows: 1. using cyclic voltammetry, the potential step and AC impedance electrochemical method of acid tin solution benzalacetone and SN-A and other organic additives on the electrodeposition of tin. The results show that the addition of organic additives tin electrodeposition process of yin and yang, the peak potential difference of 0.9V, stating the obvious irreversible electrode process; voltammogram sense of resistance occur simultaneously on a current loop, indicating tin deposition nucleation occurs during process; benzalacetone and SN-A tin can hinder the deposition of tin electrodeposition potential to improve; benzalacetone barrier of stronger than GN-A, and can hinder the precipitation of hydrogen; when the combined effects of these two additives When more conducive to get bright tin layer; adding organic additives tin deposition followed instantaneous nucleation mechanism of three-dimensional growth of the electric crystals. (2) for the first time using a variety of electrochemical test methods under acidic conditions indium plating process conditions and cathodic reaction mechanism to make a preliminary study, preliminary conclusions, sulfuric indium plated optimum pH value of 2 to 3, the optimum temperature for the 35 ~ 45 ℃; when the pH value is 3, the cathode electrode reaction standard constant of 8.188 × 10 ^{-10 cm · s ^{-1 . Indium cathodic electrodeposition process there are two pre-chemical reaction and the subsequent irreversible electrochemical reaction, in which the first step is to control the electrochemical reaction. 3. Electrochemical method in alkaline manganese batteries collector deposited copper electrode surface Sn, In and Sn-In three kinds of electrodes, where In and Sn-In electrode overpotential increased 569mV, 488mV, hydrogen suppression effect was good, and good stability in lye. In higher prices, with low price and good electrochemical stability of Sn-In alloy electrode instead of electrodes in the battery industry will be In a broader practical value.}}

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