Abstract: A solid electrolyte material having a general chemical formula of Li2+xM2+xM?1?xS6, where M is at least one of Al, Ga or In, M? is at least one of Si or Ge, and 0<x?0.5. The solid electrolyte material according to the application is simple in composition, contains no phosphorus sensitive to water, and has good Li+ conductivity at the same time.

Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and the positive electrode active material layer includes a first material and a second material; and in a fully charged state of the electrochemical apparatus, an XRD diffraction pattern of the positive electrode plate has a diffraction peak A1 of (003) crystal plane of the second material within a range of 18° to 20° and a diffraction peak C1 of (311) crystal plane of the first material within a range of 35° to 37°. The electrochemical apparatus can have prolonged high-temperature cycle life.

Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and in a fully charged state of the electrochemical apparatus, a Raman spectrum of the positive electrode active material layer has a characteristic peak A1 within a range of 580 cm?1 to 640 cm?1 and a characteristic peak B1 within a range of 420 cm?1 to 520 cm?1. The electrochemical apparatus of this application has high energy density and good cycling performance.

Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and the positive electrode active material layer includes a first material and a second material; and in a fully charged state of the electrochemical apparatus, a diffraction peak A1 of (111) crystal plane of the first material and a diffraction peak B1 of (003) crystal plane of the second material are present within a range of 18° to 20° in an XRD diffraction pattern of the positive electrode plate.

Abstract: A positive electrode includes a first positive electrode material and a second material. The first positive electrode material includes Li1+xCo1?yM1yO2?-tAt, in which M1 includes Ni, Mn, Al, Mg, Ti, Zr, La, Y, Fe, Cr, V, Zn, Ru, Rh, Ga, Pd, Pt, Mo, W, Sb, Nb, Se, Te, and/or Ce; A includes S, N, F, Cl, and/or Br; ?0.1?x?0.2, 0?y?0.2, and 0?t?0.2. The second material includes Li1+rNi1?p?qM2pM3qO2?sDs and a phase B belonging to an F-3m1 space group. M2 and M3 independently include Co, Mn, Fe, Ti, Al, V, Cr, Nb, Zr, La, and/or Y. M2 and M3 are different elements. D includes S, N, F, Cl, and/or Br; 0<r?1, 0<p<1, 0<q<1, 0<p+q?0.5, and 0?s<0.2.

Abstract: A positive electrode plate includes: a positive electrode film layer including a first positive active material Li1+xCoyM11-yO2-zAz and a second positive active material Li2+rNipCuqTiuM2vO2-sBs. ?0.1?x?0.2, 0.8?y?1, 0?z?0.2, M1 includes at least one of Ni, Mn, Al, Mg, Ti, Zr, La, Y, Fe, Cr, V, Zn, Ru, Rh, Ga, Pd, Pt, Mo, W, Sb, Nb, Se, Te, or Ce; A includes at least one of S, N, P, F, Cl, or Br; ?0.2?r?0.2, 0<p<1, 0<q<1, 0<u?0.01, 0?v?0.2, 0<p+q+u+v?1, 0?s<0.2; M2 includes at least one of Mn, Fe, Co, Al, V, Cr, Nb, Mg, Zr, La, Y, Zn, Ru, Rh, Ga, Pd, Pt, Mo, W, Sb, Nb, Se, Te, or Ce; B includes at least one of S, N, P, F, Cl, or Br.

Abstract: A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector. The positive electrode active material layer includes a first positive electrode active material Li1+xMnyM2-yO4-tAt and a second positive electrode lithiation material Li1+rMn1-pNpO2-sBs. The positive electrode plate satisfies 1.5?R·P/Q?30, where R represents resistance of the positive electrode plate in ?; P represents compacted density of the positive electrode plate in g/cm3; and Q represents single-sided surface density of the positive electrode plate in g/1540.25 mm2.

Abstract: A lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte solution. The positive electrode plate includes a positive current collector and a positive electrode material layer disposed on at least one surface of the positive current collector. The positive electrode material layer includes a first positive electrode material having formula Li1+xFeyMnzM1-y-zPO4-tAt and a second positive electrode material having formula Li2+rNi0.5-qCu0.5-qTivNp+q-vO2-sBs. The electrolyte solution includes vinylene carbonate. A content of the vinylene carbonate based on a total mass of the electrolyte solution is 0.1 wt % to 5 wt %. M includes one or more of Ti, Zr, V, or Cr; A includes one or more of S, N, F, Cl, or Br; ?0.1?x<0.1, 0<y?1, 0?z<1, 0<y+z?1, and 0?t<0.2.

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The positive electrode includes a positive active material layer. The positive active material layer includes a positive active material represented by Formula (1): Li1+rNi1?p?qM1pM2qO2?sM3s Formula (1). In Formula (1), 0<r?1, 0<p<1, 0<q<1, 0<p+q<0.5, 0?s<0.2, M1 and M2 each are independently at least one of Co, Mn, Fe, Ti, Al, V, Cr, Nb, Zr, La, or Y, and M3 is at least one of S, N, F, Cl, or Br. A resistance of the positive electrode is R ?. A compaction density of the positive electrode is P g/cm3. A single-side areal density of the positive electrode is Q g/1540.25 mm2. The positive electrode satisfies Formula (2): 3.5?R·P/Q?30 Formula (2). The electrolyte solution includes fluoroethylene carbonate.

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte. The positive electrode includes a first positive electrode material and a second positive electrode material. The first positive electrode material has good cycling stability and high initial coulombic efficiency, and the second positive electrode material has a high specific capacity and low initial coulombic efficiency during the first charge. This can compensate for the active lithium loss caused by the formation of SEI.

Abstract: A positive electrode material, including a composite material, where the composite material includes a metal fluoride, a molar ratio of fluorine F to metal element M in the metal fluoride is y, and a molar ratio of fluorine F to metal element M in the composite material is z, where y<z?y+2; and M includes at least one of Al, Cu, Co, Ni, Mn, Fe, or Ag. The positive electrode material in this application has advantages such as wide raw material sources, simple preparation processes, easy to operate, and low production costs. Lithium batteries prepared by using the positive electrode material in this application have increased specific capacity and improved rate performance and cycling performance of the positive electrode material, and good charge and discharge performance.

Abstract: Embodiments of the present application relate to a solid electrolyte and a preparation method thereof, and an electrochemical device and an electronic device comprising the solid electrolyte. The solid electrolyte comprises a lithium-containing transition metal sulfide being represented by the chemical formula of Li2?2a+bCd1+aMcGe1?dS4, where M is selected from the group consisting of Al, Ga, In, Si, Sn and a combination thereof, wherein 0<a?0.25, 0?b?0.2, 0?c?0.2, and 0?d?0.2. The embodiments of the present application effectively improve the shortcomings of poor chemical stability of the conventional thiophosphate solid electrolyte in an atmospheric environment by providing the above solid electrolyte having a thio-LISICON structure and containing no phosphorus (P), so that the solid electrolyte has both good chemical stability and high ionic conductivity, thereby reducing the processing environment requirements and manufacturing cost of the solid electrolyte.

Abstract: A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, where the positive electrode active material layer includes two respective positive electrode active materials represented by chemical formula (1) and chemical formula (2): Li1+xNaaCo1+yAlzMgpTiuMvO2+w (1), where in chemical formula (1), M includes at least one of Zr, La, or Y, ?0.1<x<0.1, 0<a<0.005, ?0.05<y<0.05, 0.01<z<0.05, 0.001<p<0.01, 0<u<0.005, 0<v<0.005, and ?0.05<w<0.05; and Li2+rNasN1+qO2+t (2), where in chemical formula (2), ?0.2<r<0.2, 0<s<0.05, ?0.1<q<0.1, ?0.05<t<0.05, and N includes at least one of Ni, Cu, Mn, Fe, or Co.

Abstract: A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, where the positive electrode active material layer includes a first positive electrode active material represented by chemical formula (1) and a second positive electrode active material represented by chemical formula (2): Li1+xAaFeyMnzTivPO4?wSw (1), and Li2+rNasM1+qO2+t (2); and the positive electrode plate satisfies: 5.2?R/Q?13.5. Such a positive electrode plate can achieve a high specific discharge capacity of the electrochemical apparatus, thereby increasing energy density of the electrochemical apparatus. In addition, a relationship between compacted density R and single surface density Q of the positive electrode plate is limited, effectively improving cycling stability and rate performance of the electrochemical apparatus.

Abstract: The present application relates to a positive electrode and an electrochemical apparatus and an electronic apparatus containing the same. The positive electrode includes a conductive agent, where the conductive agent includes a non-carbon material. The present application provides a positive electrode that includes a conductive agent with high voltage and oxidization resistance, which can effectively improve high voltage cycle performance of the electrochemical apparatus.

Abstract: A positive electrode lithium supplementing material includes at least one of Li2M1O2, Li2M2O3, Li5FexM31-xO4, or Li6MnyM41-yO4, where M1 contains at least one of Ni, Mn, Cu, Fe, Cr, or Mo; M2 contains at least one of Ni, Mn, Fe, Mo, Zr, Si, Cu, Cr, or Ru; M3 contains at least one of Al, Nb, Co, Mn, Ni, Mo, Ru, or Cr; and M4 contains at least one of Ni, Fe, Cu, or Ru; where 0?x?1 and 0?y?1.

Abstract: A solid electrolyte material having a general chemical formula of Li2+xM2+xM?1?xS6, where M is at least one of Al, Ga or In, M? is at least one of Si or Ge, and 0<x?0.5. The solid electrolyte material according to the application is simple in composition, contains no phosphorus sensitive to water, and has good Li+ conductivity at the same time.

Abstract: A lithium supplementing material includes Li5MO4 and a semiconductor oxide on a surface thereof, where M includes at least one of Fe, Ni, Mn, Ru, Cr, Cu, Nb, Al, or Mo. In this application, the lithium supplementing material containing the semiconductor oxide is used, which can significantly enhance electronic conductance of the lithium supplementing material, reduce polarization, and greatly improve a specific charge capacity of the lithium supplementing material. Applying the lithium supplementing material to a positive electrode of an electrochemical apparatus can effectively increase an energy density of the electrochemical apparatus, and also improve rate performance and cycle stability.

Abstract: Embodiments of the present application relate to a solid electrolyte and a preparation method thereof, and an electrochemical device and an electronic device comprising the same. The solid electrolyte of the present application includes a solid electrolyte material being represented by the chemical formula of Li1+2x?2yMyGa2+xP1?xS6, where M is selected from the group consisting of Sr, Ba, Zn, Cd and a combination thereof, 0?x?0.2 and 0?y?0.05. Embodiments of the present application provides a solid electrolyte having good stability with lithium and ionic conductivity by forming the solid electrolyte using lower cost solid electrolyte materials and optimizing the material composition and a crystal structure thereof. At the same time, this also reduces the manufacturing costs of the solid electrolyte, and improves the structural stability of the solid electrolyte.

Abstract: Embodiments of the present application relate to a solid electrolyte and a preparation method thereof, and an electrochemical device and an electronic device comprising the same. The solid electrolyte of the present application includes a solid electrolyte material being represented by the chemical formula of Li1+2x?2yMyGa2+xP1?xS6, where M is selected from the group consisting of Sr, Ba, Zn, Cd and a combination thereof, 0?x?0.2 and 0?y?0.05. Embodiments of the present application provides a solid electrolyte having good stability with lithium and ionic conductivity by forming the solid electrolyte using lower cost solid electrolyte materials and optimizing the material composition and a crystal structure thereof. At the same time, this also reduces the manufacturing costs of the solid electrolyte, and improves the structural stability of the solid electrolyte.