Patents by Inventor Lilan Zhang
Lilan Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11967674Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte. The electrolyte includes a nitrile compound, and the mass percentage of the nitrile compound in the electrolyte is A %; the negative electrode includes a current collector, wherein the current collector comprises a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not comprise a negative electrode active substance layer; the area of the second region is B % of the surface area of the current collector; and A×B<600.Type: GrantFiled: March 3, 2020Date of Patent: April 23, 2024Assignee: NINGDE AMPEREX TECHNOLOGY LIMITEDInventors: Lilan Zhang, Chao Tang, Jianming Zheng
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Publication number: 20240106002Abstract: An electrolyte includes ethyl propionate, propyl propionate, ethylene carbonate, and propylene carbonate, where based on a total mass of the electrolyte, a mass percentage of ethyl propionate is a %, a mass percentage of propyl propionate is b %, a mass percentage of ethylene carbonate is c %, and a mass percentage of propylene carbonate is d %, where 20?a+b?50, 0<c/d<1, and 15?c+d?50. The electrolyte significantly improves floating charge performance of electrochemical apparatuses at high voltage.Type: ApplicationFiled: October 30, 2023Publication date: March 28, 2024Applicant: Ningde Amperex Technology LimitedInventors: Wenqiang LI, Yali XIONG, Junfei LIU, Lilan ZHANG
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Patent number: 11939603Abstract: A modified cutinase is disclosed. The cutinase has the modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of asparagine at position 181 with alanine, or substitutions of asparagine at position 181 with alanine and phenylalanine at position 235 with leucine. The modified enzyme has improved PET-hydrolytic activity, and thus, the high-activity PET hydrolase is obtained, and the industrial application value of the PET hydrolase is enhanced.Type: GrantFiled: June 21, 2023Date of Patent: March 26, 2024Assignee: HUBEI UNIVERSITYInventors: Chun-Chi Chen, Jian-Wen Huang, Jian Min, Xian Li, Beilei Shi, Panpan Shen, Yu Yang, Yumei Hu, Longhai Dai, Lilan Zhang, Yunyun Yang, Rey-Ting Guo
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Publication number: 20230318038Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte, where the electrolyte includes fluoroethylene carbonate and non-fluorinated cyclic carbonate, the fluoroethylene carbonate accounts for a % of the electrolyte by mass, and the non-fluorinated cyclic carbonate accounts for b % of the electrolyte by mass, where 0.05?a/b?2.5.Type: ApplicationFiled: June 8, 2023Publication date: October 5, 2023Applicant: Ningde Amperex Technology LimitedInventors: Shuirong ZHANG, Lilan ZHANG, Xiao YUAN, Chao TANG
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Publication number: 20230307709Abstract: A negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material contains a silicon-based active material, and a mass percentage of the silicon-based active material based on a mass of the negative electrode active material is X%. The electrolyte contains metal ions. Based on mass of the electrolyte, a mass proportion of the metal ions is A ppm, and 0<X/A?8.Type: ApplicationFiled: March 15, 2023Publication date: September 28, 2023Applicant: Ningde Amperex Technology LimitedInventors: Lilan ZHANG, Chao TANG
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Patent number: 11680252Abstract: A PET hydrolase having improved thermal stability is disclosed. The PET hydrolase has a modified amino acid sequence of SEQ ID NO: 2 or a modified amino acid sequence with at least 80% sequence identity of SEQ ID NO: 2, wherein the modification is a substitution of asparagine at position 248 or a corresponding position with proline.Type: GrantFiled: November 22, 2021Date of Patent: June 20, 2023Assignee: HUBEI UNIVERSITYInventors: Chun-Chi Chen, Jian-Wen Huang, Xiuqin Li, Wei Zeng, Lilan Zhang, Yunyun Yang, Longhai Dai, Jian Min, Yu Yang, Rey-Ting Guo
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Publication number: 20230155173Abstract: An electrolyte including an imidazolium salt compound and a pyridine compound. The electrolyte, includes a compound of Formula I and a compound of Formula II: where R1 is selected from halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; and R11, R12, R13, R14 and R15 are each independently selected from H, halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; when substituted, the substituent is halo or cyano.Type: ApplicationFiled: March 3, 2020Publication date: May 18, 2023Inventors: Junfei LIU, Lilan ZHANG, Chao TANG, Jianming ZHENG
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Publication number: 20230123288Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte. The electrolyte includes a nitrile compound, and the mass percentage of the nitrile compound in the electrolyte is A %; the negative electrode includes a current collector, wherein the current collector comprises a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not comprise a negative electrode active substance layer; the area of the second region is B % of the surface area of the current collector; and A×B<600.Type: ApplicationFiled: March 3, 2020Publication date: April 20, 2023Inventors: Lilan ZHANG, Chao TANG, Jianming ZHENG
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Publication number: 20230107992Abstract: An electrochemical device includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative active material. A specific surface area of the negative active material is A m2/g and 0.3?A?4. The electrolyte includes fluorocarboxylate and fluorocarbonate. Based on a mass of the electrolyte, a mass percent of the fluorocarboxylate is X % and a mass percent of the fluorocarbonate is Y %, 5?Y?70, and the electrochemical device satisfies 50?X+Y?85, and 6?Y/A?200. The synergy between the negative active material and the electrolyte can effectively improve cycle performance of the electrochemical device under high voltages, and alleviate lithium plating of the negative electrode.Type: ApplicationFiled: September 30, 2022Publication date: April 6, 2023Applicant: Dongguan Amperex Technology LimitedInventors: Lilan ZHANG, Hui CUI, Chao TANG
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Publication number: 20220307000Abstract: A PET hydrolase having improved thermal stability is disclosed. The PET hydrolase has a modified amino acid sequence of SEQ ID NO: 2 or a modified amino acid sequence with at least 80% sequence identity of SEQ ID NO: 2, wherein the modification is a substitution of asparagine at position 248 or a corresponding position with proline.Type: ApplicationFiled: November 22, 2021Publication date: September 29, 2022Inventors: Chun-Chi Chen, Jian-Wen Huang, Xiuqin Li, Wei Zeng, Lilan Zhang, Yunyun Yang, Longhai Dai, Jian Min, Yu Yang, Rey-Ting Guo
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Publication number: 20220223915Abstract: An electrolyte including a dinitrile compound, a multi-nitrile compound with more than 2 cyano groups, and a boron-containing lithium salt. Based on a total weight of the electrolyte, a content of the dinitrile compound is A %, a content of the multi-nitrile compound is B %, and a content of the boron-containing lithium salt is C %, and 0?(A/B)?C+1?11. The cycle performance of the electrochemical device including the electrolyte is improved at a high temperature and in a high state of charge.Type: ApplicationFiled: March 30, 2022Publication date: July 14, 2022Applicant: Ningde Amperex Technology LimitedInventors: ShuiRong ZHANG, Xiao YUAN, Lilan ZHANG, Chao TANG
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Publication number: 20220216515Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, an separator, and an electrolyte, wherein the positive electrode comprises a current collector and a positive active material layer, and the positive active material layer comprises a positive active material; and the electrolyte comprises a compound of Formula I: wherein R11, R12, R13, R14, R15 and R16 are each independently selected from: H, halogen, and the following substituted or unsubstituted groups: a C1-8 alkyl group, a C2-8 alkenyl group, a C2-8 alkynyl group, or a C6-12 aryl group; and an amount of the compound of Formula I required per 1 g of the positive active material is about 0.001 g to about 0.064 g. The present application can effectively improve high-temperature storage and high-temperature cycle performance of an electrochemical apparatus.Type: ApplicationFiled: March 27, 2020Publication date: July 7, 2022Inventors: Junfei Liu, Jianming Zheng, Chao Tang, Lilan Zhang
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Publication number: 20220153690Abstract: An electrolyte including one or more nitrile benzoquinone compounds, and the nitrile benzoquinone compound is selected from the group consisting of the compounds represented by formula I, formula II, and formula III: The substituents R1 to R9 are each independently selected from the group consisting of hydrogen, a C2 to C12 ether group, a C1 to C12 alkoxy group, halogen, a C1 to C12 alkyl group, a C2 to C12 alkenyl group, a C2 to C12 alkynyl group, and a C6 to C26 aryl group. The electrolyte can form a stable protective film on a cathode, thereby increasing the cycle capacity retention rate and high temperature storage performance of an electrochemical device.Type: ApplicationFiled: January 12, 2022Publication date: May 19, 2022Applicant: Ningde Amperex Technology LimitedInventors: Lilan Zhang, Chao Tang, Weihua Zhu, Jianming Zheng
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Publication number: 20210408595Abstract: An electrochemical device including a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode comprises a negative electrode active material layer, including a negative electrode active material, wherein the negative electrode active material includes a silicon-containing compound; and the negative electrode active material further includes, on the surface, a protective layer including a compound having an S?O bond.Type: ApplicationFiled: December 26, 2019Publication date: December 30, 2021Inventors: Chao TANG, Junfei LIU, Lilan ZHANG, Jianming ZHENG
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Publication number: 20210408601Abstract: An electrolyte includes diglycolic anhydride and a trinitrile compound, with which the cycle performance and the high-temperature stability under over-discharge conditions of lithium-ion batteries are significantly improved. The electrolyte includes a compound of Formula I; and at least one of a compound of Formula II or a compound of Formula III; R1, R2, R3 and R4 are each independently selected from hydrogen, halo, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C2-C10 alkynyl, substituted or unsubstituted C6-C12 aryl, substituted or unsubstituted C1-C10 alkoxy, or substituted or unsubstituted C6-C12 aryloxy, wherein when substituted, the substituent is halo, cyano, or C1-C10 alkyl; and a, d and f are each independently selected from an integer from 1 to 5, and b, c, e, g, h and i are each independently selected from an integer from 0 to 5.Type: ApplicationFiled: December 26, 2019Publication date: December 30, 2021Inventors: Chao TANG, Lilan ZHANG, Junfei LIU, Jianming ZHENG
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Patent number: 10479985Abstract: A cellulase having improved enzymatic activity is disclosed. The cellulase has a modified amino acid sequence of SEQ ID NO: 2 or a modified amino acid sequence with at least 80% sequence identity of SEQ ID NO: 2, wherein the modification is a substitution of methionine at position 120 or a corresponding position with asparagine.Type: GrantFiled: May 8, 2019Date of Patent: November 19, 2019Assignee: HUBEI UNIVERSITYInventors: Chun-Chi Chen, Jian-Wen Huang, Longhai Dai, Xuejing Yu, Chin-Yu Chen, Shan Wu, Zhichun Zhan, Lilan Zhang, Chao Zhai, Lixin Ma, Rey-Ting Guo