Chinese Academy of Sciences

Sabic Global Technologies B.v.

Ningbo Morsh Technology Co., Ltd.

Hubei Wanrun New Energy Technology Development Co. Ltd

Ningbo Energy Material Technology Co., Ltd

Zhaoping Liu

Xufeng Zhou

Changlin Tang

Yaletu Saixi

Bao Qiu

Yonggao Xia

Ihab N Odeh

Yongsheng Zhao

Hao Luo

Yunyang Liu

Shiyun Ding

Qingwen Gu

Jiangang Zhang

Zhihong Qing

Huasheng Hu

Guanghua Yang

Zhihong Qin

Jingbo Ma

Provided is a high-entropy positive electrode material, preparation method and application thereof. The high-entropy positive electrode material has a general formula as shown in the following formula: LiABCDOMN, wherein A is a metallic element having a valence of +2, B is a metallic element having a valence of +3, C is a metallic element having a valence of +4, D is a metallic element having a valence of +5, M is an element having a valence of +7, and N is an element having a valence of +8; and 0≤a<1, 0<x<1, 0<y<1, 0<z<1, 0<b<1, 0<c<1, d>0. This high-entropy positive electrode material is designed from the structure of the material itself. Compared with the conventional positive electrode materials, it has high specific discharge capacity and has a stable structure during the cycling without oxygen evolution.

High-entropy positive electrode material, preparation method and application thereof

A thermally conductive three-dimensional (3-D) graphene-polymer composite material, methods of making, and uses thereof are described. The thermally conductive three-dimensional (3-D) graphene-polymer composite material contains: (a) a porous 3-D graphene structure comprising a network of graphene layers that are attached to one another through a carbonized organic polymer bridging agent; and (b) a polymer material impregnated within the porous 3-D graphene structure, wherein the thermally conductive 3-D graphene-polymer composite material has a thermal conductivity of 10 W/m&#xb7;K to 16 W/m&#xb7;K.

Thermally conductive three-dimensional (3-D) graphene polymer composite materials, methods of making, and uses thereof

Provided in the present invention are a battery paste, a battery electrode plate, and a preparation method therefor, the battery electrode plate comprising a current collector and an electrode paste film attached to the current collector; the electrode paste film comprises an active substance, a conductive agent, a polymer binder, and fluorophosphate Compared to the prior art, by means of adjusting the components of the electrode paste film, prepared battery electrode plates of the present invention, particularly thick electrode plates, have excellent recycling performance and high rate charge and discharge performance; the preparation method is simple, easy to execute, and low cost, can incorporate existing production devices, and is suitable for use in industrial production; in addition, the battery electrode plate of the present invention contains fluorophosphate, which has a fire retardant effect and can improve the safety of lithium ion batteriesM[POF]&#x2003;&#x2003;(I)

Battery paste, battery electrode plate, and preparation method therefor

The present invention provides a graphene composite powder form material that is suitable for industrialized application. The graphene composite powder form material is composited by graphene materials and a high-molecular compound. The high-molecular compound is uniformly coated on surfaces of the graphene material. Any adjacent graphene materials are separated by the high-molecular compound. An apparent density of the graphene composite powder form material is larger than or equal to 0.02 g/cm. Under an external pressure, the graphene materials in the graphene composite powder form material do not re-stack, and can be easily restored to original form, which benefit the storage and transportation. Besides, the graphene composite powder form material has a good compatibility in other material systems, which greatly broadens the application fields in the downstream products and successfully solves the problem in industrial application. The present invention also provides a method for making the graphene composite powder form material.

Graphene composite powder form material and method for making the same

A lithium-rich manganese-based positive electrode material represented by formula (I). In an X-ray diffraction pattern of the lithium-rich manganese-based positive electrode material, a ratio of a diffraction peak intensity of a Bragg angle near 18.7&#xb0; to a diffraction peak intensity of a Bragg angle near 44.6&#xb0; is 1.10 to 1.24. A method for preparing the lithium-rich manganese-based positive electrode material comprises: mixing a lithium-rich manganese-based compound with a lithium remover; and under the effect of the lithium remover, removing part of LiO from LiMnOin the lithium-rich manganese-based compound, so as to obtain the lithium-rich manganese-based positive electrode material. Due to the reduction of the irreversible product LiO, the initial coulombic efficiency is improved; because of existence of lithium vacancy and oxygen vacancy, the lithium-rich manganese-based positive electrode material has good rate performance and cycle performance.()LiMnOMnO(1&#x2212;)Li(MM')O&#x2003;&#x2003;(I)

Lithium-rich manganese-based positive electrode material and preparation method therefor

The present invention provides a graphene coating-modified electrode plate for lithium secondary battery, characterized in that, the electrode plate comprises a current collector foil, graphene layers coated on both surfaces of the current collector foil, and electrode active material layers coated on the graphene layers. A graphene coating-modified electrode plate for lithium secondary battery according to the present invention comprises a current collector foil, graphene layers coated on both surfaces of the current collector foil, and electrode active material layers coated on the graphene layers. The graphene-modified electrode plate for lithium secondary battery thus obtained increases the electrical conductivity and dissipation functions of the electrode plate due to the better electrical conductivity and thermal conductivity of graphene. The present invention further provides a method for producing a graphene coating-modified electrode plate for lithium secondary battery.

Graphene coating modified electrode plate for lithium secondary battery and method for producing the same

Provided is a positive electrode material for a lithium battery with an atomic ratio expressed by the formula (I) Li(MMn)(OZ) for 0.8&#x2264;a&#x2264;1.2, 0&#x2264;x&#x2264;1 and 0&#x2264;y&#x2264;1 in which M is one or more of Li, Na, K, Ca, Mg, Al, Ti, Sc, Ge, V, Cr, Zr, Co, Ni, Zn, Cu, La, Ce, Mn, Hf, Nb, Ta, Mo, W, Ru, Ag, Sn, Pb and Si and Z is one or more of OH, halogens, N, P, S and O, and the primary particles of the positive electrode material have a spheroidal topography. The adjacent (111) family planes of the primary particles are connected by curved surfaces without obvious edges. A preparing method of a positive electrode material for a lithium battery and a lithium battery are also provided. The positive electrode material of the present invention provides a good high-temperature cycling performance and filling capability.

Positive electrode material for lithium battery, preparing method thereof and lithium battery

The present invention provides a method for preparing graphene, including reacting graphite in an acid solution in which an oxidant is present so as to obtain a graphene. Compared with the prior art, the advantages of the present invention reside in that, the graphene prepared by the method of the present invention has excellent quality and substantially increased yield and production rate, as compared with mechanical stripping, epitaxial growth, and chemical vapor deposition; and the graphene prepared by the method of the present invention has significantly improved quality, substantially reduced structural defects, and significantly increased conductivity, as compared with oxidation-reduction preparation in the solution-phase; besides, the method is also advantageous for a simple process, mild conditions, low cost, and very easy for scale production. The graphene prepared by the present invention has very broad prospects in the fields of lithium-ion batteries, supercapacitors, functional composite materials, transparent conductive films, and microelectronic devices, etc.

Growing community of inventors

Zhejiang, China

Zhaoping Liu