결정 구조가 다른 몇 가지 종류의 MnO₂에 대하여 Li/MnO₂ 전지의 양극 특성을 시험하였다. 시험에 사용된 MnO₂는 300℃와 450℃에서 열처리한 EMD, 산처리한 EMD, I.C. No. 6（International Common Sample） MnO₂, 산처리한 I.C. No.6 MnO₂ 등이었다. 각 시료의 XRD(x-ray diffraction) pattern으로부터 300℃에서 열처리한 EMD는 · -MnO₂이고 그외의 MnO₂는 -MnO₂의 결정 구조를 가지고 있음이 확인되었으나, -MnO₂ 중에서도 EMD를 원재료로 사용한 경우 피크의 폭이 I.C. No.6 MnO₂에 비해 넓었다.
양극 방전 시험결과는 산처리한 EMD의 방전 전압이 높고 고율에서의 방전 효율이 우수함을 보여 주었다. I.C. No.6 MnO₂를 원재료로 사용한 경우 거의 전기화학적 활성이 없는 것으로 나타났으며, 이상과 같은 각 시료의 방전 특성을 결정 구조와 입도 분포, SEM 사진 등의 결과를 이용하여 설명하였다.

The effect of different crystal structures of MnO₂ depolarizer on the discharge characteristics of Li/MnO₂ was investigated. Six MnO₂ samples were tested. Among them were : EMD heat treated at 300℃ and 450℃, respectively, acid digested EMD, I.C. No. 6 MnO₂ and acid digested I.C. No. 6 MnO₂. Through x-ray diffraction pattern analysis, it was found that the EMD sample heat treated at 300℃ had crystal structure of Υ-β-MnO₂, and the rest of them had all the of β-MnO₂. The XRD patterns for all the samples started from EMD had broader peaks while those for the samples started from I.C. No. 6 sample had sharper and better defined peaks. Test cells made from the EMDs showed higher discharge operation voltage and better utilization of active material than those from I.C. No. 6 MnO₂. It was attempted to explain these results in terms of the crystal structure, particle size distribution, SEM picture as well as other physico-chemical properties of MnO₂ samples.

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