公开(公告)号：US20240396040A1

公开(公告)日：2024-11-28

申请号：US18201678

申请日：2023-05-24

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  YANAN WEI ,  JUNLING WANG

IPC: H01M4/58 ,  C01G53/00 ,  H01M4/36 ,  H01M4/583 ,  H01M4/62 ,  H01M10/42 ,  H01M50/403 ,  H01M50/417 ,  H01M50/431 ,  H01M50/446 ,  H01M50/451 ,  H01M50/46

Abstract: Disclosed in the present invention are methods for preparing a CoNi—S@3D-C nanocomposite and a modified battery separator. The CoNi—S@3D-C material synthesized by the method of the present invention is applicable not only to a lithium-ion battery but also to a sodium-ion battery. As the anode for both the lithium-ion and sodium-ion batteries, it exhibits good energy storage performance, maintaining very stable performance even under high-density current charging and discharging cycles, while also possessing very high reversible capacity. The heteroatom-doped three-dimensional nanocarbon structure achieves good encapsulation of the metal sulfides, and can effectively inhibit the volume expansion of the metal sulfides, slowing down the decline of its specific capacity and maintaining the high capacity and service life of the anode material. The CoNi—S@3D-C material of the present invention can also be used as a material for modifying a separator of a lithium-sulfur battery. The modified separator can improve the safety performance of the lithium-sulfur battery while maintaining a high energy storage effect of the battery and slowing down the capacity decline of the lithium-sulfur battery.

公开(公告)号：US20230340702A1

公开(公告)日：2023-10-26

申请号：US18115357

申请日：2023-02-28

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  YUXIN ZHOU ,  JUNLING WANG ,  YUHUI XIA ,  HAOZE YANG ,  WENXI WANG ,  PENG DONG ,  FAN YI

IPC: D01F8/16 ,  D01D5/34 ,  D01F8/08 ,  D01D1/02 ,  D01F1/07 ,  D01D7/00 ,  D01D5/00 ,  H01M10/0525 ,  H01M50/383 ,  H01M10/653

CPC classification number: D01F8/16 ,  D01D5/34 ,  D01F8/08 ,  D01D1/02 ,  D01F1/07 ,  D01D7/00 ,  D01D5/0038 ,  H01M10/0525 ,  H01M50/383 ,  H01M10/653 ,  D10B2401/04 ,  D10B2331/10 ,  D10B2321/10 ,  D10B2505/00

Abstract: The present disclosure discloses a phase-change flame-retardant fiber material for thermal management of a lithium ion battery in a closed space and a preparation method. The phase-change flame-retardant fiber material is prepared in a coaxial electrostatic spinning manner and includes a composite phase-change fiber material PASA-TPU at a core part and a flame-retardant fiber material TB-PAN wrapping a surface of the core part. The composite phase-change fiber material is well wrapped with the flame-retardant fiber material, and the lithium ion battery wrapping the whole phase-change flame-retardant fiber material in the closed space is subjected to charge-discharge cycle; the result shows that the surface temperature of the battery can be effectively reduced by about 20° C. by the material, and the material can effectively play a role in multiple cycle processes; the whole material has an excellent and stable heat absorption effect, and has no leakage and collapse; and the phase-change flame-retardant fiber material only has thermal shrinkage and blackening phenomena and is not combusted after being ignited by open fire for over 20 s. Therefore, the phase-change flame-retardant fiber material of the present disclosure has a relatively good flame-retardant effect compared with other phase-change materials.

公开(公告)号：US20200333272A1

公开(公告)日：2020-10-22

申请号：US16958753

申请日：2018-10-25

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  SHUOXUN SHEN ,  SHENGPING ZHAO ,  JUNCHENG JIANG ,  XUE'E ZHAO ,  ZHAN DOU

IPC: G01N25/02 ,  G01N17/04

Abstract: Disclosed is a method for predicting corrosion and spontaneous combustion of sulfur-related petrochemical equipment. The method solves the issues in the existing techniques that includes narrow predicting range, high workload in installation and maintenance, and time lag in predicting corrosion and spontaneous combustion inside equipment. The method comprises a step of a dual index system prediction, which includes a step of monitoring a temperature and a step of detecting SO2 gas generated by spontaneous combustion. The time when spontaneous combustion occurs can be accurately calculated by using a fitted quantitative relationship formula generated by the spontaneous combustion of corrosion products. The method has a low Labor cost. The method has a low labor cost and, does not require on-site gas detection to be carried out by means of manual detection, which both reduces the cost and ensures the detection accuracy.

公开(公告)号：US20230401343A1

公开(公告)日：2023-12-14

申请号：US18203291

申请日：2023-05-30

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  TENGFEI HE ,  YANGYAN ZHENG

IPC: G06F30/10 ,  G06F30/27

CPC classification number: G06F30/10 ,  G06F30/27 ,  G06F2111/06

Abstract: The present invention discloses a three-dimensional modeling method for thermal runaway of a lithium-ion battery under different state of charge (SOC) conditions based on a differential scanning calorimeter (DSC) experiment, comprising S1: obtaining an active material of a battery, and performing a DSC experiment to obtain a heat flow curve; S2: dividing the heat flow curve of the battery into a plurality of reaction peaks to obtain a reaction enthalpy of each peak of the battery; S3: analyzing the heat flow curve by utilizing a Kissinger equation to obtain activation energy and a pre-exponential factor; S4: fitting the heat flow curve of the material of the battery by using a genetic algorithm to obtain a reaction order of the active material of the lithium-ion battery; S5: establishing a thermal runaway model of the battery, and comparing simulation experimental results to verify the feasibility of the model; and S6: changing the SOC of the lithium-ion battery, and studying the influence of different SOC on the thermal runaway of the lithium-ion battery. The thermal runaway model established based on the DSC experiment according to the present invention can actually reproduce the thermal runaway reaction of the lithium-ion battery during the thermal runaway process and improve the accuracy of the model.

公开(公告)号：US20230265261A1

公开(公告)日：2023-08-24

申请号：US18111589

申请日：2023-02-19

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  HAOBO ZHOU ,  JUNLING WANG ,  YANGYAN ZHENG

IPC: C08K3/22 ,  C08K7/00 ,  C08L79/08

CPC classification number: C08K3/22 ,  C08K7/00 ,  C08L79/085 ,  B82Y40/00

Abstract: The present application discloses a nanocomposite flame retardant. The nanocomposite flame retardant includes 9.7-9.8 wt % of MXene nanosheets, 72.7-76.5 wt % of bimetallic hydroxide and 13.8-17.5 wt % of cuprous oxide particles. The present disclosure further discloses flame-retardant bismaleimide resin added with the nanocomposite flame retardant and a preparation method of the flame-retardant bismaleimide resin. According to the present disclosure, the flame retardant is prepared from magnesium and aluminum elements, so the production cost of the flame retardant is reduced; and meanwhile, the particle size of the cuprous oxide particles is reduced, the specific surface area of cuprous oxide is increased, the catalytic efficiency of the cuprous oxide per unit mass can be improved, and then the flame-retardant and toxicity-reducing effects of products are improved.