Abstract:
A negative electrode for a rechargeable lithium thin film battery is provided to prevent a mechanical crack phenomenon generated in the conventional negative electrode thin films by controlling volume change during a charge and discharge process. A negative electrode for a rechargeable lithium thin film battery includes a negative electrode thin film comprising (a) a silicon-metal active layer(105b) having a metal which does not react with lithium but reacts with silicon and (b) a buffer layer which is a metal layer(103b) or silicon-metal layer having a low silicon content on the silicon-metal active layer, and comprises a multi-layered thin film in which the silicon-metal active layers and buffer layers are alternately laminated.
Abstract:
Provided are a thin film battery which is improved in capacity and is reduced in internal electrical resistance by increasing the thickness of a cathode and is excellent in high rate charge/discharge, and its preparation method. The thin film battery comprises a first current collector, a cathode, an electrolyte, an anode and a second current collector which are integrated on a substrate, wherein the cathode(2) comprises at least one pair of electrically conductive metal layer(22) and lithium transition metal oxide layer(21) layered on the first current collector(1) in turn. Preferably the electrically conductive metal layer is made of any one selected from the group consisting of Ag, Au, Pt, Pd, Cu, Co and their alloy and has a thickness of 5 Angstrom to 1 micrometer; and the lithium transition metal oxide layer is made of any one selected from the group consisting of LiCoO2, LiMn2O4, LiNiO2, LiCo_(1-x) Ni_x O2 and has a thickness of 0.5-3 micrometers.
Abstract translation:提供一种能够提高容量的薄膜电池,通过增加阴极的厚度而降低内部电阻,并且具有优异的高倍率充电/放电及其制备方法。 薄膜电池包括集成在基板上的第一集电器,阴极,电解质,阳极和第二集电器,其中阴极(2)包括至少一对导电金属层(22)和 依次层叠在第一集电体(1)上的锂过渡金属氧化物层(21)。 优选地,导电金属层由选自Ag,Au,Pt,Pd,Cu,Co及其合金中的任何一种制成,并且具有5埃至1微米的厚度; 并且锂过渡金属氧化物层由选自LiCoO 2,LiMn 2 O 4,LiNiO 2,LiCo_(1-x)Ni_x O 2中的任何一种制成,并且具有0.5-3微米的厚度。
Abstract:
PURPOSE: A solid electrolyte for a lithium secondary battery, its preparation method and a lithium secondary battery and a microsensor containing the electrolyte are provided, to improve the stability of the solid electrolyte at an electrode and an interface by a high lithium ion conductivity, a low electron conductivity and a structurally stable network structure. CONSTITUTION: The solid electrolyte comprises five elements comprising Li, B, X, O and N, wherein the molar ratio of X/B is 1 or less and X is selected from the group consisting of Si, Al, Ge and As. The method comprises the steps of forming a target capable of providing Li, B, X and O with a molar ratio of X/B of 1 or less; and sputtering it under pure N2 or the atmosphere containing N2 to form a thin film comprising five elements comprising Li, B, X, O and N. Also the solid electrolyte comprises five elements comprising Li, B, P, O and N, wherein the molar ratio of P/B is 1 or less. The method comprises the steps of forming a target capable of providing Li, B, P and O with a molar ratio of P/B of 1 or less; and sputtering it under pure N2 or the atmosphere containing N2 to form a thin film containing five elements comprising Li, B, P, O and N.
Abstract:
Si 및 MxSiy를포함하는코어부; 및상기코어부상에 Si 및다수의기공을포함하는쉘부를포함하고, 상기쉘부상에탄소코팅층을포함하며, 상기 MxSiy에서, M은 2A, 3A, 4A족원소및 전이금속으로이루어진군에서선택되는하나이상의원소이고, 1≤x≤4이며, 1≤y≤4인것을특징으로하는음극활물질에관한것이다. 본발명의일 실시예에따르면, 충방전시음극활물질의부피팽창을최소화할수 있고, 기계적물성강화는물론, 충방전이진행되면서전극이팽창된후에도우수한전기전도성을부여할수 있어, 리튬이차전지의성능을더욱향상시킬수 있다.
Abstract:
Si 및 MSi를포함하는코어부; 및상기코어부상에 Si 및다수의기공을포함하는쉘부를포함하며, 상기 MSi에서, M은 2A, 3A, 4A족원소및 전이금속으로이루어진군에서선택되는하나이상의원소이고, 1≤x≤4이며, 1≤y≤4인것을특징으로하는다공성실리콘계음극활물질, 및이의제조방법에관한것이다. 본발명의일 실시예에따르면, 충방전시음극활물질의부피팽창을최소화함으로써리튬이차전지의용량특성및 수명특성을향상시킬수 있다. 또한, 본발명의일 실시예에따른다공성실리콘계음극활물질의제조방법에따르면, MSi(금속실리사이드) 상및 Si 상이균일하게분포된 Si-MSi합금에에칭조건을조절함으로써기공의형성깊이, 기공의직경및 내부공극률을제어하여상기 Si-MSi합금을포함하는코어부와 Si 및다수의기공을포함하는쉘부를포함하는다공성실리콘계음극활물질을용이하게제조할수 있다.