The known vanadium oxides VO 2 + y ( 0 ≤ y < 0.5 ) have been examined as cathode materials in ambient temperature nonaqueous secondary lithium cells. The discharge products have also been chemically prepared and characterized by x‐ray diffraction, thermal analysis, and magnetic susceptibility. The best cathode materials are V 6 O 13 and a slightly oxygen‐rich V 6 O 13 + y . Electrochemical and chemical preparations afford Li x V 6 O 13 + y ( x ≤ 8 ) . The Li x V 6 O 13 is described as an insertion compound of V 6 O 13 .
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Murphy et al. (1981) studied this question.