ELECTRICITY STORAGE DEVICE AND CHARGE/DISCHARGE SYSTEM
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United States of America Patent
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Jul 6, 2017
app pub date -
Feb 9, 2015
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Feb 18, 2014
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Abstract
An electricity storage device includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and an electrolyte. The electrolyte contains anions and cations. The cations include at least lithium ions. The positive electrode active material includes a first carbonaceous material and a second carbonaceous material. The first carbonaceous material realizes a capacity by means of a first reaction in which the anions are adsorbed and desorbed. The second carbonaceous material realizes a capacity by means of a second reaction in which the anions are intercalated and deintercalated.
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