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The effects of particle size of Li-Si alloy and LiCl-KCl addition as a binder phase for raw material ofanode were investigated on the formability of the thermal battery anode. The formability was evaluated with respect tofilling density, tap density, compaction density, spring-back and compressive strength. With increasing particle size ofLi-Si alloy powder, densities increased while spring-back and compressive strength decreased. Since the small spring-back is beneficial to avoiding breakage of pressed compacts, larger particles might be more suitable for anode forming.The increasing amount of LiCl-KCl binder phase contributed to reducing spring-back, improving the formability ofanode powder too. The control of particle size also seems to be helpful to get double pressed pellets, which consistedof two layer of anode and electrolyte. Keywords: Thermal battery, Anode, Li-Si alloy, Powder compaction, Formability ······························································································································· ·································································································

has been widely used for cathode materials in thermal battery because of its high stability and current capability at high operation temperature. Salts such as a LiCl-KCl were added as a binder for improving electrical performance and formability of cathode powder. In this study, the effects of the addition of in LiCl-KCl binder on the formability of powder compact were investigated. With the increasing amount of addition to LiCl-KCl binder salts, the strength of the pressed compacts increased considerably when the powder mixture were pre-heat-treated above . The heat-treatment resulted in promoting the coating coverage of particles by the salts as was added. The observed coating as addition might be attributed to the enhanced wettability of the salt rather than its reduced melting temperature. The high strength of compacts by the addition and pre-heat-treatment could improve the formability of raw materials.