In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.

A lithium ion secondary battery negative electrode active material capable of suppressing decrease in discharge capacity retention ratio (cycle characteristic) even after repeating charge and discharge. The lithium ion secondary battery negative electrode active material is a composite with silicon particles being dispersed in a matrix that contains a lithium aluminosilicate having a three-dimensional network structure, wherein the lithium aluminosilicate is represented by the following general formula (1):

LiAl.sub.xSi.sub.yO.sub.1/2+3x/2+2y+(1),

wherein in the general formula (1), x satisfies 0.4x2.5, y satisfies 0.4y6.8, and satisfies 0.40.4.

A lithium ion secondary battery negative electrode active material capable of suppressing decrease in discharge capacity retention ratio (cycle characteristic) even after repeating charge and discharge. The lithium ion secondary battery negative electrode active material is a composite with silicon particles being dispersed in a matrix that contains a lithium aluminosilicate having a three-dimensional network structure, wherein the lithium aluminosilicate is represented by the following general formula (1):

LiAl.sub.xSi.sub.yO.sub.1/2+3x/2+2y+(1),

wherein in the general formula (1), x satisfies 0.4x2.5, y satisfies 0.4y6.8, and satisfies 0.40.4.

A positive electrode material, a positive electrode including the same, a lithium battery including the same, and a method of preparing the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material including forming a first coating layer on a surface of a lithium transition metal oxide represented by Formula 1 using a basic aqueous solution containing a coating element M.sup.1 (where M.sup.1 includes at least one selected from sodium (Na) and aluminum (Al)), dry-mixing the lithium transition metal oxide having the first coating layer formed on a surface thereof, and a raw material containing a coating element M.sup.2 (where M.sup.2 includes boron (B)) and heat treating the mixture to form a second coating layer.

A solid electrolyte, a method of manufacturing the same, and a lithium battery including the solid electrolyte. The solid electrolyte may include a solid ion conductor represented by Formula 1:

Li.sub.aB.sub.bAl.sub.mQ.sub.nO.sub.cX.sub.dFormula 1

wherein, in Formula 1, Q is an element that has an ionic radius that differs from an ionic radius of Al by less than 30% and has +3 and +5 valence states, X is at least one of F, Cl, Br, or I, 3.5a4.5, 3b<5.2, 1m3, 0<n<2, 11c13, and 0<d1.5.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to solid chalcohalide electrolytes and the efficient synthesis of solid chalcohalide electrolytes. The electrolytes have the general formula A.sub.aM.sub.bN.sub.cX.sub.dY.sub.eS.sub.f and have relatively high ionic conductivity. The electrolytes can be a component of different types of batteries. The process of synthesizing the electrolytes can be done with cost-effective materials, which is useful for scaling-up production of batteries such as all-solid-state batteries.