| 摘要 |
Accumulator is described which comprises an anode and a cathode immersed in a soln. of H2SO4 as electrolyte, the electrodes comprising a Pb-Sb grid coated with an active material. The accumulator also includes a sepg. membrane close to the cathode and comprising a delating resin having a macroporous polystyrene skeleton, the resin chain contg. aminophosphonic gps. to capture some or all of the Sb that passes into soln. in the electrolyte. Sb is used in electrodes to improve flow during their prepn., as well as the contact between the grid and the active material during use. However, during use, Sb goes into soln. in the electrolyte, leading to reactions with evolution of H2 (danger of explosion) and eventual deposition of metallic Sb; in addn., SbH3 (toxic) may be formed. Use of sepg. membranes of electrical resistance compatible with the optimum functioning of the accumulator prevents migration of SbO+ ions towards the cathode and overcomes the above problems. The method is esp. useful for batteries working in confined environments, e.g. in submerines. |
