Abstract:
A lithium-transition metal complex compound has an nth order hierarchical structure in which n type structures represented by at least one unit of ath order units in a range of 1×10-(a+5) m to 10×10-(a+5) m exist in a complex form, wherein n is a natural number that is 2 or greater, and a is a natural number in a range of 1 to 5. The lithium-transition metal complex may be prepared by heat-treating a mixture including a lithium source, a transition metal source, and solvent in contact with a natural material having a hierarchical structure. A lithium battery includes an electrode including the lithium-transition metal complex compound having the nth order hierarchical structure. The lithium battery can have improved rapid charging characteristics, high power characteristics, and cycle characteristics.
Abstract:
A secondary battery includes a negative electrode; a positive electrode including a plurality of positive electrode plates spaced apart from each other in a width direction, wherein a positive electrode plate of the plurality of positive electrode plates has a planar shape, and a channel between the plurality of positive electrode plates; an electrolyte material disposed in the channel between the plurality of positive electrode plates; a separation membrane between the negative electrode and the positive electrode; and a first metal layer disposed on a surface of the separation membrane facing the positive electrode.
Abstract:
A cathode including: a cathode current collector; and a cathode active material layer disposed on the cathode current collector and including a first surface, and a second surface opposite the first surface and adjacent to the cathode current collector, wherein the cathode active material layer includes a cathode active material including a dopant, and wherein a concentration gradient of the dopant decreases in a direction from the first surface to the second surface.
Abstract:
A composite electrolyte including a polymeric ionic liquid; and an oligomeric electrolyte, wherein the oligomeric electrolyte includes an oligomer.
Abstract:
A polymer electrolyte for a lithium battery, wherein the polymer electrolyte includes a polymerization product of a lithium ion conductive compound including an ethylenically unsaturated bond, a lithium ion conductive unit, and an ion-exchangeable functional group; and a heteroatom-containing ionic liquid polymerizable with the lithium ion conductive compound.
Abstract:
A lithium metal battery including: a lithium negative electrode including lithium metal; a positive electrode; and an electrolyte interposed between the lithium negative electrode and the positive electrode, wherein the electrolyte contains non-fluorine substituted ether, which is capable of solvating lithium ions, a fluorine substituted ether represented by the following Formula 1, and a lithium salt, wherein an amount of the fluorine substituted ether represented by Formula 1 is greater than an amount of the non-fluorine substituted ether, R—{O(CH2)a}b—CH2—O—CnF2nH Formula 1 wherein R is —CmF2mH or —CmF2m+1, n is an integer of 2 or greater, m is an integer of 1 or greater, a is an integer of 1 or 2, and b is 0 or 1.