CATHODE ACTIVE MATERIAL, CATHODE COMPRISING SAME, AND SECONDARY BATTERY
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United States of America Patent
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May 13, 2021
app pub date -
Jul 26, 2019
filing date -
Jul 27, 2018
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Abstract
Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.
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