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：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：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.