A non-aqueous electrolyte secondary battery including a positive electrode capable of reversibly absorbing and desorbing lithium, a negative electrode including an alloy material as an active material, and a non-aqueous electrolyte, wherein the alloy material includes a phase (phase A) containing at least Si and a phase (phase B) containing an intermetallic compound composed of Si and at least one selected from the group consisting of Ti, Zr, Ni and Cu, and the alloy material contains 0.0006 to 1.0 wt % of Fe in a metallic state.

 
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< Lithium-ion battery

> System for controlling voltage balancing in a plurality of lithium-ion cell battery packs and method thereof

> X-ray sensitive battery separator and a method for detecting the position of a separator in a battery

~ 00581