Lithium battery
AssigneeSamsung Electronics Co., Ltd.
InventorsHyeokjo Gwon, Jinkju Kang, Kitae Park, Hyunchul Lee, Ryounghee Kim, Euncheol Do, Soojin Park, Sangmin Ji
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Abstract
Provided herein is a lithium battery including: a cathode including a cathode active material; an anode including an anode active material; an electrolyte between the cathode and the anode; and a separator impregnated with the electrolyte, wherein the separator includes cellulose nanofibers, and wherein a differential scanning calorimetry (DSC) thermogram of the separator evinces an exothermic reaction peak, represented by a differential value (dH/dT), at a temperature in a range of about 150° C. to about 200° C.
Claims30
A lithium battery comprising:
- a cathode comprising a cathode active material;
- an anode comprising an anode active material;
- an electrolyte disposed between the cathode and the anode;
- and
- a separator impregnated with the electrolyte,
- wherein the separator comprises cellulose nanofibers, and
- wherein a differential scanning calorimetry (DSC) thermogram of the separator impregnated with the electrolyte does not show an exothermic reaction peak as represented by a differential value (dH/dT) within a temperature range of about 150° C. to about 200° C.,
- wherein the cellulose nanofibers comprise carboxyl group-containing microbial cellulose nanofibers,
- wherein the carboxyl group of the carboxyl group-containing microbial cellulose nanofibers is bound to a carbon atom of a pyranose ring and is represented by Formula a or b below:
- —R1—O—R2—COOM <Formula a>
- —O—R2—COOM, <Formula b>
- wherein R1 and R2 are each independently a substituted or unsubstituted C1-C10 alkylene group, and M is hydrogen or an alkali metal.
Dependencies are inferred from the claim text.