A bipolar battery comprises: a plurality of bipolar electrodes; electrolyte layers formed between adjacent ones of the plurality of bipolar electrodes, respectively; sealing portions surrounding and sealing the electrolyte layers, respectively; and contributing members contributing to keeping gaps between the adjacent ones of the plurality of bipolar electrodes, respectively. The contributing members are disposed within areas of the sealing portions, respectively.

 
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> Lithium secondary battery comprising a super fine fibrous polymer separator film and its fabrication method

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