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公开(公告)号：US20230402653A1
公开(公告)日：2023-12-14
申请号：US18036400
申请日：2021-11-17
发明人： Yunxian Qian , Shiguang Hu , Hongmei Li , Xiaogang Yuan , Yonghong Deng
IPC分类号： H01M10/0567 , H01M10/0525 , H01M4/58 , H01M10/0569 , H01M10/0568 , H01M10/42 , C07C265/14
CPC分类号： H01M10/0567 , H01M10/0525 , H01M4/5825 , H01M10/0569 , H01M10/0568 , H01M10/4235 , C07C265/14 , H01M2004/028
摘要： The application relates to the technical field of lithium ion batteries and discloses a lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode, a separator arranged between the positive electrode and negative electrode, and a non-aqueous electrolyte; an active material of the positive electrode comprises LiFePO4, the non-aqueous electrolyte comprises an organic solvent, a lithium salt, vinylene carbonate and a compound represented by Formula (1), wherein R1 is one or more of chain, cyclic and aromatic group with 2-20 carbon atoms, and a compacted density of the positive electrode material is more than 2 g/cm3. The lithium ion battery provided by the application may obviously improve the cycle and storage performances at high temperature, greatly improve the capacity retention rate and capacity recovery rate of battery, obviously reduce the thickness expansion rate after high-temperature storage, and meanwhile, greatly reduce the precipitation of iron ions.
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公开(公告)号：US20220140389A1
公开(公告)日：2022-05-05
申请号：US17434016
申请日：2020-04-10
发明人： Zhongbo Liu , Yuanyuan Kang , Furen Zheng , Yonghong Deng
IPC分类号： H01M10/0565 , H01M10/0525
摘要： In order to overcome the problem of low ionic conductivity in the existing polymer solid electrolyte, the disclosure provides a solid electrolyte, comprising a polymer, a lithium salt and an additive, the additive is selected from an aprotic organic solvent with a carbon number lower than 10 and a relative dielectric constant higher than 3.6; the mass content of the lithium salt is 30%˜90%, and the mass content of the additive is 0.01%˜2%, based on the total mass of the solid electrolyte being 100%. Further provided is a polymer lithium ion battery comprising the solid electrolyte. According to the solid electrolyte of the disclosure, a trace amount of small molecule aprotic organic solvent with high dielectric constant is introduced as an additive, which can inhibit crystallization of the solid electrolyte, promote transmission of lithium ions in the electrolyte, and improve the ionic conductivity of the solid electrolyte at room temperature.
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公开(公告)号：US20240097187A1
公开(公告)日：2024-03-21
申请号：US18269755
申请日：2021-12-16
发明人： Yunxian Qian , Shiguang Hu , Guiyan Sun , Xionggui Lin , Yonghong Deng
IPC分类号： H01M10/0567 , H01M4/525 , H01M4/62 , H01M10/0568 , H01M10/0569
CPC分类号： H01M10/0567 , H01M4/525 , H01M4/623 , H01M10/0568 , H01M10/0569 , H01M2004/028
摘要： The existing positive electrode material that is doped or coated with compound has the problem OF ion dissolution and battery performance deterioration at high temperature. To solve it, the invention provides a lithium-ion battery, comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode material layer, the positive electrode material layer comprises a positive electrode active material, and the positive electrode active material comprises LiMO2, where M is selected from one or more of Ni, Co and Mn, and the positive electrode active material is doped with a compound containing metal element A and/or coated with a compound containing metal element A, the non-aqueous electrolyte comprises a solvent, an electrolyte salt and a compound represented by Structural formula 1. The lithium-ion battery provided by the invention could effectively improve the overall stability of the material.
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公开(公告)号：US20230231126A1
公开(公告)日：2023-07-20
申请号：US17772130
申请日：2022-04-06
发明人： Yunxian Qian , Shiguang Hu , Yonghong Deng , Hongmei Li , Xiaoxia Xiang
IPC分类号： H01M4/525 , H01M4/36 , H01M10/0525 , H01M4/62
CPC分类号： H01M4/525 , H01M4/366 , H01M10/0525 , H01M4/625
摘要： Provided is a lithium ion battery, comprising a positive electrode containing a positive electrode material layer, a negative electrode and a non-aqueous electrolyte, the layer comprises a positive electrode active material, the material comprises LixNiyCozM1-y-zO2, M is at least one element selected from Mn and Al, the material is doped or coated with an element E, which is selected from one or more of Ba, Zn, Ti, Mg, Zr, W, Y, Si, Sn, B, Co, and P, a potential range of the positive electrode active material with respect to lithium metal is ≥4.25V;
the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, the additive comprises a compound represented by structural formula 1:
the lithium ion battery meets the following requirements:
0.1≤(H/T)×M/1000≤10; and
80≤H≤150,0.005≤T≤0.8,0.05≤M≤3.
The lithium ion battery provided by the application has a lower battery impedance and excellent high-temperature cycle performance.-
公开(公告)号：US20240356070A1
公开(公告)日：2024-10-24
申请号：US18292337
申请日：2022-06-20
发明人： Shiguang Hu , Yunxian Qian , Zhengsheng Zhang , Xiaoxia Xiang , Yonghong Deng
IPC分类号： H01M10/0567 , H01M4/02 , H01M4/505 , H01M4/62 , H01M10/0525 , H01M10/42
CPC分类号： H01M10/0567 , H01M4/505 , H01M4/625 , H01M10/0525 , H01M10/4235 , H01M2004/028 , H01M2300/004
摘要： The application relates to the technical field of electrochemistry, in particular to a lithium ion battery, which comprises a positive electrode, a negative electrode and an electrolyte; the positive electrode comprises a positive electrode active material and a conductive agent, the positive electrode active material is a manganese-containing positive electrode material; the electrolyte comprises a compound represented by the following structural formula 1:
The positive electrode active material, the conductive agent and the compound represented by structural formula 1 meet the following condition:
0
.
5
≤
D
r
×
T
r
w
≤
1
6
wherein, Dr and Tr are the ratios of the average particle size and specific surface area of the positive electrode active material to the conductive agent, respectively; w is the mass percentage of the compound represented by structural formula 1 in the electrolyte, and the unit is %.-
公开(公告)号：US11502300B1
公开(公告)日：2022-11-15
申请号：US17630514
申请日：2021-12-27
发明人： Yunxian Qian , Shiguang Hu , Yonghong Deng , Hongmei Li , Xiaoxia Xiang
摘要： Provided is a secondary battery, comprising a positive electrode, the positive electrode comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active material and a compound represented by structural formula I: the positive electrode active material includes one or more of the compounds represented by Li1+xNiaCobM′1−a−bO2−yAy and Li1+zMncL2−cO4−dBd; the positive electrode material layer meets the following requirements: 0.05≤p·u/v≤15 wherein, u is the percentage mass content of element phosphorus in the positive electrode material layer, and the unit is wt %; v is the percentage mass content of element M in the positive electrode material layer, element M is selected from one or two of Mn and Al, and the unit is wt %; p is the surface density of one single surface of the positive electrode material layer, and the unit is mg/cm2.
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公开(公告)号：US20240313263A1
公开(公告)日：2024-09-19
申请号：US18259300
申请日：2021-12-16
发明人： Shiguang Hu , Yunxian Qian , Chaowei Cao , Pengkai Guo , Xiaoxia Xiang , Chi Wang , Shuhuai Xiang , Qun Chen , Yonghong Deng
IPC分类号： H01M10/0567 , C07D411/14 , H01M4/02 , H01M4/131 , H01M4/525 , H01M10/0525
CPC分类号： H01M10/0567 , C07D411/14 , H01M4/131 , H01M4/525 , H01M10/0525 , H01M2004/028 , H01M2300/0025
摘要： A lithium-ion battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material includes LiNixCoyMnzL(1-x-y-2)O2, where L is Al, Sr, Mg. Ti, Ca, Zr, Zn, Si, Cu, V or Fe, 0.5≤x≤1, 0≤y≤0.5, 0≤z≤0.5, 0≤x+y+z≤1, and an upper limit voltage of the lithium-ion battery is ≥4.2 V. The non-aqueous electrolyte includes a solvent, an electrolyte salt and a compound represented by formula 1: A-D-B-E-C, Formula 1. Based on a total mass of the non-aqueous electrolyte as 100%, the compound represented by the formula 1 is added in an amount of 0.01 to 5.0%.
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公开(公告)号：US12009480B2
公开(公告)日：2024-06-11
申请号：US17281280
申请日：2019-09-29
发明人： Yonghong Deng , Bing Han , Yinglin Xiao
IPC分类号： H01M10/0568 , H01M4/36 , H01M4/38 , H01M10/052 , H01M10/0567 , H01M10/0569
CPC分类号： H01M10/0568 , H01M4/364 , H01M4/381 , H01M4/382 , H01M10/052 , H01M10/0567 , H01M10/0569 , H01M2300/0034 , H01M2300/0037
摘要： Provided is a metal-sulfur battery, comprising a positive electrode material, a negative electrode material and an electrolyte, the positive electrode material comprises one of elemental sulfur and S-based compound; the electrolyte comprises a solvent and an electrolyte salt; and the electrolyte salt comprises one or more salts represented by structural formulas 1-3:
wherein, R1 is selected from S or Se; R2 is selected from C, Si, Ge or Sn; M1 is selected from N, B, P, As, Sb or Bi; M2 is selected from Li, Na, K, Ru, Cs, Fr, Al, Mg, Zn, Be, Ca, Sr, Ba or Ra; R3 is selected from a carbon chain or an aromatic ring with part or all of hydrogen substituted by other elements or groups. The metal-sulfur battery provided by the disclosure can effectively solve the short circuit problem caused by metal dendrites on the negative electrode of existing metal-sulfur battery.-
公开(公告)号：US20240136577A1
公开(公告)日：2024-04-25
申请号：US18010817
申请日：2022-11-16
发明人： Yonghong Deng , Yunxian Qian , Shiguang Hu , Xionggui Lin , Hongmei Li
IPC分类号： H01M10/0567 , H01M4/50 , H01M10/42
CPC分类号： H01M10/0567 , H01M4/502 , H01M10/4235 , H01M10/0525
摘要： In order to solve the problem that the existing manganese-based positive electrode material battery has insufficient high-temperature cycle and high-temperature storage performances due to the dissolution of manganese ions, the present application provides a secondary battery, comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive electrode comprises a positive electrode material layer containing a positive electrode active material, the positive electrode active material comprises a manganese-based material, and the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, and the additive comprises a compound represented by structural formula 1:
the secondary battery meets the following requirements:
0.05≤100×W×u/(q×s)≤5;
and 2.0 g/Ah≤W≤4.5 g/Ah, 0.05%≤u≤3.5%, 5%≤q≤65%, 10 mg/cm2≤s≤30 mg/cm2.
The secondary battery has a high capacity retention rate in the cycle and high-temperature storage processes, and has good cycle and storage performances.-
公开(公告)号：US20240079652A1
公开(公告)日：2024-03-07
申请号：US18259332
申请日：2021-12-16
发明人： Yunxian Qian , Shiguang Hu , Fangzheng Liu , Yonghong Deng
IPC分类号： H01M10/0568 , H01M4/131 , H01M4/133 , H01M4/505 , H01M4/525 , H01M4/587 , H01M10/0525
CPC分类号： H01M10/0568 , H01M4/131 , H01M4/133 , H01M4/505 , H01M4/525 , H01M4/587 , H01M10/0525
摘要： In order to overcome the problems in existing lithium ion batteries having high compactness and high-specific-surface-area negative electrodes of serious side reactions of electrolytes and high gas production, the present invention provides a lithium ion battery, comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode comprises a negative electrode material layer, the compaction density of the negative electrode material layer is greater than or equal to 1.4 g/cm3, and the negative electrode material layer comprises a negative electrode active material, and the non-aqueous electrolyte comprises a solvent, an electrolyte salt, a vinylene carbonate, a fluoroethylene carbonate, and an unsaturated phosphate represented by structural formula 1, and the electrolyte salt comprises LiPF6 and LiFSI. The lithium ion battery provided by the present invention has good cycle performance, high and low temperature storage performance, and lithium precipitation resistance.
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