An oxide-based solid-state secondary battery and a binder for a solid-state secondary battery using an oxide-based solid electrolyte that contains a fluorine-containing polymer including a vinylidene fluoride unit and a fluorinated monomer unit other than the vinylidene fluoride unit. The fluorinated monomer unit is at least one copolymerization unit (A) selected from a monomer unit having a structure represented by formula (1) and a monomer unit having a structure represented by formula (2):

##STR00001##

wherein Rf.sub.1 and Rf.sub.2are each a linear or branched fluorinated alkyl or fluorinated alkoxy group with 1 to 12 carbon atoms, which optionally contains an oxygen atom between carbon-carbon atoms when the number of carbon atoms is 2 or more.

A solid nanocomposite electrolyte material comprising a mesoporous dielectric material comprising a plurality of interconnected pores and an electrolyte layer covering inner surfaces of the mesoporous dielectric material. The electrolyte layer comprises: a first layer comprising a first dipolar compound or a first ionic compound, the first dipolar or ionic compound comprising a first pole of a first polarity and a second pole of a second polarity opposite to the first polarity, wherein the first layer is adsorbed on the inner surfaces with the first pole facing the inner surfaces; and a second layer covering the first layer, the second layer comprising a second ionic compound or a salt comprising first ions of the first polarity and second ions of the second polarity, wherein the first ions of the ionic compound or salt are bound to the first layer.

A component for a lithium battery including a first layer including a lithium garnet having a porosity of 0 percent to less than 25 percent, based on a total volume of the first layer; and a second layer on the first layer and having a porosity of 25 percent to 80 percent, based on a total volume of the second layer, wherein the second layer is on the first layer and the second layer has a composition that is different from a composition of the first layer.

A protected anode, an electrochemical device including the same, and a method of preparing the electrochemical device. The protected anode may include: an anode layer; and a protective layer including an oxide represented by Formula 1, on the anode layer:

##STRFormula 1##

In Formula 1, A is at least one of Ge, Sb, Bi, Se, Sn, or Pb; M is at least one of In, Tl, Sb, Bi, S, Se, Te, or Po; A and M are different from each other; and 0<x<100 and 0<y<100.

A coaxially arranged energy storage device suitable for energy storage and structural support for a composite component is provided. The coaxially arranged energy storage device contains an anode core of a continuous carbon fiber;, an electrolyte coating coaxially arranged on the continuous carbon fiber core; and a cathode layer coating coaxially arranged to the continuous carbon fiber core on the electrolyte coating. The electrolyte coating comprises a gel or elastomer of a cross-linked polymer and a lithium salt and a Young's modulus of the gel or elastomer of a cross-linked polymer is from 0.1 MPa to 10 Mpa. The cathode layer comprises particles of a cathode active material embedded in a matrix of an electrically conductive polymer. Methods to prepare the coaxially arranged energy storage device are described and utilities described.

A negative electrode with little degradation is provided. Alternatively, a novel negative electrode is provided. A secondary battery includes a positive electrode and a negative electrode, and the negative electrode includes a solvent containing fluorine, a current collector, a negative electrode active material, and graphene. The negative electrode further includes a solid electrolyte material and the solid electrolyte material is an oxide. The negative electrode active material may contain fluorine. The secondary battery may include a plurality of electrolytes different from each other. The negative electrode active material is, for example, a material containing one or more elements selected from silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium.

The invention relates to a positive plate for a lithium battery, preparation method thereof and use in semi-solid state battery. The positive plate for a lithium battery comprises a current collector and an active material layer arranged on a surface of the current collector; and the active material layer comprises a positive electrode active material, a conductive agent, a binder, an oxide solid-state electrolyte and a polymer obtained by in-situ polymerization. The oxide solid-state electrolyte and polymer are evenly distributed in the active material layer; wherein the oxide solid-state electrolyte can effectively improve the safety performance of the positive plate; and the polymer obtained by in situ polymerization can effectively improve the contact between the oxide solid-state electrolyte and the material in the positive plate, thereby reducing the impedance of the positive plate and improving the electrochemical performance of the positive plate. The combination of the oxide solid-state electrolyte and polymer in the present application enables the positive plate of the present application to possess excellent electrochemical performance, in addition to excellent safety performance.

An anode piece for a lithium battery having both high safety and high capacity, and a preparation method and a use therefor, the anode piece being mixed with a lithium-rich compound, the lithium-rich compound being at least one selected from lithium-rich manganese-based solid solution, a lithium-rich solid electrolyte or a lithium-separated silicon oxide. Li ions can be pulled away from the lithium-rich compound in extreme conditions such as overcharging, internal short circuiting, external short circuiting, thermal abuse, piercing, compressing or overheating, thereby filling in lithium vacancies in the anode material, stabilizing the crystal lattice structure of the anode material, improving safety performance in a battery manufactured by using the material, and allowing the anode piece to maintain excellent cycle performance at higher area capacities.

One embodiment of the present invention relates to a solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, or an all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, boron, phosphorus, and oxygen as constituent elements, wherein a peak position of a peak having the maximum peak intensity among an .sup.11B-NMR peak is in the range of -15.0 to -5.0 ppm.

A perovskite-type composite oxide powder is a perovskite-type composite oxide powder represented by a general formula ABO.sub.3-δ (where δ represents an amount of deficiency of oxygen and 0≤δ<1), an element contained in an A site is La, elements contained in a B site are Co and Ni and a crystallite size determined by a Williamson-Hall method is equal to or greater than 20 nm and equal to or less than 100 nm. In this way, when the perovskite-type composite oxide powder is used as an air electrode material for a fuel cell, an air electrode in which the resistance thereof is low and the conductivity thereof is high can be obtained.