(NL9101015-A)      Half-cell comprises a housing enclosing an electrolyte-contg. suspension, an electrode in contact with the suspension and a membrane which can form a partition with a second half-cell allowing the construction of an accumulator.    The suspension comprises metal particles of a selected metal, an electrolyte and ceramic additive particles which promote chain formation in the suspension. The suspension is essentially stationary during charge and discharge.    This half-cell is charged by supplying current to it, forming metal from reaction prods. which formed during discharge. Following current withdrawal during discharge at least part of the suspension is replaced by the same amt. of a previously charged suspension.    A metal suspension accumulator comprising one or more assemblies of half-cells of the type described, separated by a membrane, is also claimed.    USE/ADVANTAGE -   This invention has a good suspension stability with a larger amt. of electrolyte available to dissolve material formed during discharge compared with prior art. Mechanical circulation of the suspension used in prior art is no longer required. Lower metal suspension resistance and a higher energy density is achieved. Self-discharge of metal particles in electrolyte can be inhibited. Particle size is less critical then in prior art    (NL9200717-A)      Half-cell comprises a housing enclosing an electrolyte-contg. suspension, an electrode in contact with the suspension and a membrane which can form a partition with a second half-cell allowing the construction of an accumulator.    The suspension comprises metal particles of a selected metal, an electrolyte and ceramic additive particles which promote chain formation in the suspension. The suspension is essentially stationary during charge and discharge.    This half-cell is charged by supplying current to it, forming metal from reaction prods. which formed during discharge. Following current withdrawal during discharge, at least part of the suspension is replaced by the same amt. of a previously charged suspension.    A metal suspension accumulator comprising one or more assemblies of half-cells of the type described, separated by a membrane, is also claimed.    USE/ADVANTAGE -   This invention has a good suspension stability with a larger amt. of electrolyte available to dissolve material formed during discharge compared with prior art. Mechanical circulation of the suspension used in prior art is no longer required. Lower metal suspension resistance and a higher energy density is achieved. Self-discharge of metal particles in the electrolyte can be inhibited. Particle size is less critical than in prior art.    (US5368952-A)      The metal suspension half cell for an accumulator comprises a housing or electrolyte contg. suspension, an electrode in contact with the suspension and a membrane which can form a partition with a 2nd half cell.    The suspension also comprises in addn. to metal particles, additive particles comprising at least one ceramic material which promotes chain formation in the suspension.    The suspension is stationary during charging and/or discharging. The additive particles are halloysite, sepiolite, attapulgite, B4C, TiN or ZrN or mixts. of two or more of these.    The metal particles are Zn, Cd, Fe or Pb. The suspension is incorporated within metal nonwoven or metal foam material pref. Cu, Cu coated with Pb, Cu coated with Cd or Cu coated with Ag.    ADVANTAGE -   Circulation of the suspension is not necessary. High suspension stability. Improved cell performance.