Non-aqueous lithium type storage element

Abstract

A non-aqueous lithium-type electrical storage element, which includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution containing lithium ions, the above-mentioned negative electrode has a negative electrode collector and is arranged on one or both sides of the above-mentioned negative electrode collector. A negative electrode active material layer comprising a negative electrode active material on the surface, and the above-mentioned negative electrode active material includes a carbon material capable of absorbing and releasing lithium ions, and furthermore, the above-mentioned positive electrode has a positive electrode current collector and is arranged on one side of the above-mentioned positive electrode current collector or The positive electrode active material layer comprising the above positive electrode active material on both sides, and the above positive electrode active material comprises activated carbon, in addition, the above positive electrode active material layer contains 1.60×10 per unit mass relative to the above positive electrode material layer ‑4 mol / g~300×10 ‑ 4 mol / g of one or more compounds selected from the following formulas (1) to (3). {where, R 1 R 2 , R 3 x 1 、X 2 represents a group defined in the specification of the present application. }LiX 1 -OR 1 O‑X 2 Li (1); LiX 1 -OR 1 O‑X 2 R 2 (2);R 2 x 1 -OR 1 O‑X 2 R 3 (3).

Description

technical field [0001] The present invention relates to a nonaqueous lithium type electric storage element. Background technique [0002] In recent years, from the perspective of protecting the global environment and saving resources and effectively using energy, wind power generation power stabilization systems or late-night power storage systems, household distributed power storage systems based on photovoltaic power generation technology, and electric vehicles Power storage systems and the like are attracting attention. [0003] The first requirement for batteries used in these power storage systems is high energy density. As a powerful supplement to high-energy-density batteries that can meet such demands, development of lithium-ion batteries has been actively promoted. [0004] The second requirement is high output characteristics. For example, in a combination of a high-efficiency engine and a power storage system (such as a hybrid electric vehicle), or a combinatio...

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Problems solved by technology

[0017] In addition, when used in a low-temperature environment below 0°C, lithium dendrites will precipitate on the negative electrode interface, which may cause performance degradation and internal short circuit, which has become a serious problem in terms of the safety and reliability of the storage device. big problem

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