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Experimental study demonstrates lithium-ion shuttling across spinel transition-metal electrodes at high voltage, indicating reduced safety hazards over metallic anodes.
Anodes of , , and with a spinel‐type structure have been evaluated in room‐temperature lithium cells. The cathodes that were selected for this study were the stabilized spinels, and , and layered . The electrochemical data demonstrated that Li+ ions will shuttle between two transition‐metal host structures (anode and cathode) at a reasonably high voltage with a concomitant change in the oxidation state of the transition metal cations so that the Li+ ions do not reduce to the metallic state at the anode during charge. These cells reduce the safety hazards associated with cells containing metallic‐lithium, lithium‐alloy, and lithium‐carbon anodes.
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Ferg et al. (1994) studied this question.
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