32results about How to "Improve lithium ion mobility" patented technology

An additive for an electrolyte solution includes a lithium salt having an oxalato complex as an anion and a compound represented by following Chemical Formula 1. Wherein, a represents C or Si, b represents H or F, and n represents an integer of 1 to 5. A non-aqueous electrolyte solution including the additive and a lithium secondary battery including the electrolyte solution also are provided.

In a Li ion conductivity oxide solid electrolyte containing lithium, lanthanum, and zirconium, a part of oxygen is substituted by an element M (M=N, Cl, S, Se, or Te) having smaller electronegativity than oxygen.

The present invention provides an electrode material for a secondary battery wherein the inside and the surface of a lithium-titanium complex oxide is composited with a fine carbon fiber as a network.

A lithium ion-conducting compound, having a garnet-like crystal structure, and having the general formula: Lin[A(3-a′-a″)A′(a′)A″(a″)][B(2-b′-b″)B′(b′)B″(b″)][C′(c′)C″(c″)]O12, where A, A′, A″ stand for a dodecahedral position of the crystal structure, where A stands for La, Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and / or Yb, A′ stands for Ca, Sr and / or Ba, A″ stands for Na and / or K, 0<a′<2 and 0<a″<1, where B, B′, B″ stand for an octahedral position of the crystal structure, where B stands for Zr, Hf and / or Sn, B′ stands for Ta, Nb, Sb and / or Bi, B″ stands for at least one element selected from the group including Te, W and Mo, 0<b′<2 and 0<b″<2, where C and C″ stand for a tetrahedral position of the crystal structure, where C stands for Al and Ga, C″ stands for Si and / or Ge, 0<c′<0.5 and 0<c″<0.4, and where n=7+a′+2·a″−b′−2·b″−3·c′−4·c″ and 5.5<n<6.875.

An organic-inorganic silicon structure-containing block copolymer including a first domain including an ion conductive polymer block; and a second domain including a polymer block including a non-conducting polymer and an organic-inorganic silicon structure, wherein the organic-inorganic silicon structure is connected to a side chain connected to a backbone of the non-conducting polymer.

The invention provides a preparation method for a graphene / lithium titanate coated lithium sulfide composite material. The preparation method comprises the following steps of (1) loading commercial lithium sulfide into a sealed ball milling tank; then putting the tank into a ball mill to be subjected to ball milling to obtain nanometer lithium sulfide; (2) adding tetrabutyl titanate to ethyl alcohol while stirring, and dissolving to form a tetrabutyl titanate ethyl alcohol solution; (3) enabling the nanometer lithium sulfide to be dispersed to an ethyl alcohol solution containing ammonium hydroxide, and adding the tetrabutyl titanate ethyl alcohol solution to a suspension liquid in a dropwise manner; (4) enabling an obtained precursor to be mixed with lithium carbonate powder, and adding the mixture to a muffle furnace under inert gas protection to perform a reaction to obtain the lithium titanate coated lithium sulfide; and (5) adding the lithium titanate coated lithium sulfide and graphene to tetrahydrofuran, and performing an ultrasonic reaction to obtain the graphene / lithium titanate coated lithium sulfide composite material. The lithium titanate structure is relatively stable in the charge-discharge process of the composite material, so that the loss of sulfur-based material can be effectively prevented.

The present disclosure relates to a precursor of a positive electrode active material for a secondary battery including a single layer-structured secondary particle in which pillar-shaped primary particles radially oriented in a surface direction from the particle center are aggregated, wherein the secondary particle has a shell shape, and the primary particle includes a composite metal hydroxide of Ni—Co—Mn of the following Chemical Formula 1, and a positive electrode active material prepared using the same:Ni1−(x+y+z)CoxMyMnz(OH)2  [Chemical Formula 1]In Chemical Formula 1, M, x, y and z have the same definitions as in the specification.

An additive for an electrolyte solution includes a lithium salt having an oxalato complex as an anion and a compound represented by following Chemical Formula 1.Wherein, a represents C or Si, b represents H or F, and n represents an integer of 1 to 5. A non-aqueous electrolyte solution including the additive and a lithium secondary battery including the electrolyte solution also are provided.

The invention discloses a surface-coating type lithium nickel manganese oxide material, a lithium battery and a preparation method thereof. The surface-coating type lithium nickel manganese oxide material is characterized in that the surface of LiNi0.5Mn1.5O4 is coated with LiM0.5Mn1.5O4 with spinel structure, wherein M is positive bivalent metal ion. The surface-coating type lithium nickel manganese oxide material is characterized in that the particle size is small and uniform, and the electro-chemical property of LiNi0.5Mn1.5O4 is favorably improved; the surface of the prepared material is coated with LiM0.5Mn1.5O4 with electro-chemical inactivity, so that the good lithium ion transfer rate and good structure stability of LiNi0.5Mn1.5O4 are guaranteed in the charging and discharging process, and the side reaction of LiNi0.5Mn1.5O4 and electrolyte is inhibited. The preparation method has the advantages that the operation is simple, the preparation is convenient, and the cost is low; the significance on promoting the application and development of LiNi0.5Mn1.5O4 positive electrode material is realized.

A positive electrode active material includes a lithium transition metal oxide represented by Formula 1, and a lithium-containing inorganic compound layer formed on a surface of the lithium transition metal oxide,Li1+a(NibCocXdM1eM2f)1−aO2  [Formula 1]in Formula 1, X is at least one selected from the group consisting of manganese (Mn) and aluminum (Al), M1 is at least one selected from the group consisting of sulfur (S), fluorine (F), phosphorus (P), and nitrogen (N), M2 is at least one selected from the group consisting of zirconium (Zr), boron (B), cobalt (Co), tungsten (W), magnesium (Mg), cerium (Ce), tantalum (Ta), titanium (Ti), strontium (Sr), barium (Ba), hafnium (Hf), F, P, S, lanthanum (La), and yttrium (Y), 0≤a≤0.1, 0.6≤b≤0.99, 0≤c≤0.2, 0≤d≤0.2, 0<e≤0.1, and 0<f≤0.1. A method of preparing the positive electrode active material, a positive electrode and a lithium secondary battery are also provided.