A rechargeable lithium cell comprising an anode, a separator, a cathode, and an electrolyte or an electrolyte solution, characterized in that said anode comprises (a) a metal capable of being alloyed with lithium and (b) a metal incapable of being alloyed with lithium, said anode contains lithium when charging is operated, and wherein an anode terminal is extended from a portion formed of said metal (b).

Rechargeable lithium battery

A high capacity lithium secondary battery with excellent safety is provided by suppressing expansion of a negative electrode active material during charge and increasing the content of a heat-resistant resin in a separator relative to conventional one. The lithium secondary battery includes: a negative electrode active material that comprises compound particles containing at least one metal element selected from the group consisting of Si, Sn, Al, and Zn; and a separator that has a first porous layer comprising polyolefin and a second porous layer comprising a heat-resistant resin. The separator contains 10 to 60 parts by weight of the second porous layer per 100 parts by weight of the first porous layer.

Lithium Secondary Battery

A battery capable of improving battery characteristics such as cycle characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains 4-fluoro-1,3-dioxolane-2-one. Fluorine ion content in the electrolytic solution is preferably from 10 weight ppm to 3200 weight ppm. Thereby, chemical stability of the electrolytic solution is improved, and cycle characteristics are improved. The present invention is effective for the case using an anode active material containing Sn or Si as an element for an anode.

Electrolytic solution and battery

A subject for the invention is to improve the cycle characteristics of a high-capacity secondary battery containing an active material packed at a high density, by using a particulate active material having a low aspect ratio. The invention relates to a nonaqueous-electrolyte secondary battery comprising a negative electrode and a positive electrode each capable of occluding/releasing lithium, a separator, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and a lithium salt, characterized in that the separator comprises a porous film made of a thermoplastic resin containing an inorganic filler, and at least either of the following is satisfied: the active material contained in the negative electrode is a particulate active material having an aspect ratio of from 1.02 to 3; and the active material contained in the positive electrode is a particulate active material having an aspect ratio of from 1.02 to 2.2.

Nonaqueous electrolyte secondary battery

Lithium rich and manganese rich lithium metal oxides are described that provide for excellent performance in lithium-based batteries. The specific compositions can be engineered within a specified range of compositions to provide desired performance characteristics. Selected compositions can provide high values of specific capacity with a reasonably high average voltage. Compositions of particular interest can be represented by the formula, x Li2MnO3 • (1-x) Li Niu+ΔMnu-ΔCowAyO2. The compositions undergo significant first cycle irreversible changes, but the compositions cycle stably after the first cycle.

Layer-layer lithium rich complex metal oxides with high specific capacity and excellent cycling

Disclosed is a nonaqueous electrolyte secondary battery which employs a mixed positive electrode active material produced by mixing a layered oxide that shows an initial charge-discharge efficiency of less than 100% (hereinafter, referred to as a first layered oxide) with a layered oxide that shows an initial charge/discharge efficiency of 100% or higher (hereinafter, referred to as a second layered oxide), wherein the initial charge/discharge efficiencies are measured by using metal lithium as a counter electrode. The first layered oxide may be Li1+aMnxCoyNizO2. The second layered oxide showing an initial charge-discharge efficiency of 100% or higher may be a layered compound which is previously delithiated by the treatment with an acid or the like, and a sodium oxide such as LiANaBMnXCoYNiZO2. A layered oxide produced by substituting (ion-exchanging) sodium in LiANaBMnXCoYNiZO2 by lithium may also be used as the second layered oxide.

Nonaqueous electrolyte secondary battery and method for production thereof

An electrolyte for a nonaqueous battery according to the present invention consists essentially of magnesium bistrifluoromethanesulfonimide. An electrolytic solution for a nonaqueous battery according to the present invention includes the magnesium bistrifluoromethanesulfonimide, and an organic solvent such as a cyclic carbonate, a chain carbonate, a cyclic ether and a chain ether or an ordinary temperature molten salt having a melting point of 60° C. or less in which the magnesium bistrifluoromethanesulfonimide is dissolved.

Electrolyte for nanaqueous battery, method for producing the same, and electrolytic solution for nonaqueous battery

PROBLEM TO BE SOLVED: To provide a lithium secondary battery positive electrode active material having excellent battery characteristics, the material being a solid solution made of LiMO 2 and Li 2 MnO 3 , with less elution of manganese occurring even after repeated charge and discharge at a high rate. SOLUTION: The lithium secondary battery positive electrode active material is formed as solid solution particles composed of a lithium transition metal complex oxide (320) expressed by general formula LiMO 2 (wherein M indicates at least one or more metal elements containing at least one transition metal element selected from a group of Co, Ni and Mn) and a lithium manganese dioxide (310) expressed by Li 2 MnO 3 . The active material has a concentration gradient such that the concentration of Li 2 MnO 3 is increasingly higher than that of LiMO 2 as getting closer to the center of a solid solution particle, while the concentration of LiMO 2 is increasingly higher than that of Li 2 MnO 3 as getting closer to the outer surface of the solid solution particle. COPYRIGHT: (C)2011,JPO&INPIT

Lithium secondary battery positive electrode active material

In a non-aqueous electrolyte secondary cell including a positive electrode, a negative electrode and a non-aqueous electrolyte, the negative electrode includes a material capable of absorbing or releasing lithium and wherein the non-aqueous electrolyte contains a room-temperature molten salt having a melting point of 60° C. or less and a lithium salt.

Non-aqueous electrolyte secondary cell

A secondary battery is characterized by using an organic material including carbon having a conjugate electron cloud and coupled with an electron attractive group; or a material obtained by baking a fluorocarbon polymer or graphite fluoride in an inert atmosphere at a temperature in the range of from the decomposition start temperature to 1000° C., as a positive electrode active material for the secondary battery.

Positive electrode active material for secondary battery and secondary battery

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Hideyuki Koga

Author Tools

Chat about Author