摘要:
In order to suppress deterioration in battery characteristics of a non-aqueous electrolyte secondary battery at a high temperature and to reduce the amount of gas generated within the battery, as a solute constituting an electrolyte, at least one selected from the group consisting of LiPF6, LiBF4, LiSbF6 and LiAsF6 as well as at least one selected from the group consisting of LiPFa(CbF2b+1)6−a, LiPFc(CdF2d+1SO2)6−c, LiBFe(CfF2f+1)4−e, LiBFg(ChF2h+1SO2)4−g are used.
摘要:
A non-aqueous electrolyte is disclosed, which comprises a non-aqueous solvent and a solute represented by the general formula(1): MBR1R2R3R4, wherein M is an alkali metal atom or an ammonium group and R1 to R4 are each independently electron withdrawing groups or electron withdrawing atoms bound to B where at least one of R1 to R4 is other than a fluorine atom. The solute has a thermal stability substantially equal to that of LiBF4 and an anion portion having a high electronegativity, and easily dissociates into ions. Therefore, a non-aqueous electrolyte containing this solute has a high ionic conductivity and is difficult to cause a generation of a gas or deterioration in characteristics due to the decomposition of the solute, which occurs during use at high temperatures or after storage at high temperatures.
摘要翻译:公开了一种非水电解质,其包含非水溶剂和由通式(1)表示的溶质:MBR 1 R 2 2 R 3 R 4,其中M是碱金属原子或铵基,R 1至R 4各自独立地是吸电子 与B结合的基团或吸电原子,其中R 1至R 4中的至少一个不是氟原子。 溶质的热稳定性基本上等于LiBF 4 S的热稳定性和具有高电负性的阴离子部分,并且容易解离成离子。 因此,含有这种溶质的非水电解质具有高的离子导电性,并且难以引起气体的产生或由于在高温使用期间或在高温下保存后发生的溶质的分解导致的特性劣化 。
摘要:
A polymeric solid electrolyte capable of conducting lithium ions which contains silylamide bonds in its polymer skeleton structure, for example, which is obtained by a method comprising subjecting a mixture of lithium silylamide and an organic compound having at least one carbon—carbon double bond to a polymerization in a dry atmosphere; and a lithium secondary cell using the polymeric solid electrolyte. The polymeric solid electrolyte is a “dry” polymeric solid electrolyte which contains counter ions forming lithium salts with lithium ions in its polymer skeleton structure and thus has a single ion electron conducting system wherein lithium ions alone are mobile ions, and hence has excellent conductivity, and further is easy to produce. The polymeric solid electrolyte can therefore be used for producing a novel lithium secondary cell which is an alternative for conventional lithium cells using an organic solvent and is safe and excellent in the capability of corresponding to a variety of shapes and has a high cell voltage.
摘要:
A non-aqueous electrolyte secondary battery which comprises a positive electrode containing a lithium-containing oxide; a negative electrode containing a material capable of absorbing and releasing lithium; and a non-aqueous electrolyte containing a non-aqueous solvent containing at least one non-cyclic ester and which is excellent in storage stability at high temperatures is provided by adding an oxidation resistance improving agent such as triphenylmethane, tetraphehylmethane or the like.
摘要:
A non-aqueous electrolyte battery excellent in high-temperature storage characteristics is provided by adding to the non-aqueous electrolye a compound represented by the following formula: in the above formula, R1, R2 and R3 independently represent a hydrogen atom, a halogen atom or a straight chain or branched chain alkyl group.
摘要:
A lithium secondary cell comprising a safe aqueous-solution electrolyte free from danger of firing and explosion and capable of supplying a high voltage of more than 3 V. The cell includes a positive plate having an active material absorbing/desorbing lithium ions and exhibiting a high voltage, a negative plate having an active material exhibiting a low voltage, a polymer solid electrolyte having a lithium-ionic conductivity, and an aqueous-solution electrolyte. The positive and negative plates are coated with a polymer solid electrolyte having an ionic conductivity and therefore isolated from the aqueous-solution electrolyte by the plate coating layers.
摘要:
The present invention relates to an electrolyte for non-aqueous electrochemical device containing at least one of 6-substituted-1,3,5-triazine-2,4-dithiol and derivatives thereof as an additive and a non-aqueous electrochemical device, particularly a lithium secondary battery by the use thereof. The additive of the present invention forms a stable and low resistance film on the positive electrode, inhibiting characteristics of the electrochemical device from deteriorating on account of gas generated due to the decomposition of electrolyte.
摘要:
In an electrolyte of a non-aqueous electrolyte secondary battery using a cyclic carboxylic-acid ester exerting high conductivity under a low temperature condition, for suppressing reductive decomposition of the cyclic carboxylic acid ester, a cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond is contained, and for suppressing excessive polymerization reaction of the cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond, a cyclic carbonic acid ester having no carbon-carbon unsaturated bond is further contained.
摘要:
For providing a non-aqueous electrolyte secondary battery having excellent storage characteristics when stored in the charged state under a high temperature condition, the non-aqueous electrolyte or the negative electrode is made to contain divinylethylene carbonate, thereby to form a film derived from divinylethylene carbonate on the surface of the negative electrode material.
摘要:
A salicyl derivative or a salicylidene derivative such as salicyl alcohol or salicylaldehyde is added to a non-aqueous electrolyte to prevent evolution of gas caused by decomposition of the solvent.