Abstract:
Provided herein are electrochemical cells that include a seal impermeable to a liquid electrolyte and that is bonded to a solid-state Li ion-conducting electrolyte in a manner that effectively isolates and protects a Li metal negative electrode from exposure to either, or both, a liquid electrolyte or a gel electrolyte used as a catholyte in the positive electrode. Some of the electrochemical cells include a series of electrochemical stacks, which may be stacked in a variety of configurations including configurations that share a Li metal negative electrode.
Abstract:
L'invention est relative à l'utilisation du nitrate de lithium en tant que seul sel de lithium assurant la conductivité ionique dans une batterie rechargeable gélifiée au lithium métallique et ne comprenant pas d'ions polysulfures, pour améliorer sa durée de vie.
Abstract:
A separator for a battery formed from a polymer gel electrolyte that is disposed within the pores of a polymer mesh. The polymer gel electrolyte is formed from a crosslinked ion-conducting polymer and an ionic liquid. The separator is formed from a gel loaded with an electrolyte, which prevents issue with electrolyte leakage. The polymer mesh provides stability to the polymer gel electrolyte, allowing for use of thin films of the polymer gel electrolyte and use of soft polymer gel electrolytes.
Abstract:
Disclosed herein is a method of making a component of a membrane electrode assembly. The method includes forming an electrode on an air-permeable backer comprising ePTFE, depositing a mixture comprising ionomer and a water-insoluble alcohol onto said electrode, drying said mixture to form a protective ionomer layer, and depositing an ePTFE-reinforced ionomer layer onto said protective ionomer layer.
Abstract:
Various embodiments of binder compositions, electrodes incorporating the binder compositions, fabrication methods for the binder compositions, and energy storage devices having the electrodes are disclosed herein. In one embodiment, a binder composition includes an electrolyte solution that is ionically conductive, a polymeric material having a plurality of molecules mixed with the electrolyte solution, and a filler having a plurality of electrically conductive particles suspended in the adhesive matrix. The electrolyte solution plasticizing the polymeric material forming an adhesive matrix having the molecules of the polymeric material in an amorphous state.
Abstract:
An apparatus comprising: a first electrode comprising a substantially homogeneous mixture of graphene oxide and a proton conductor; a second electrode comprising reduced graphene oxide; and spaced-apart charge collectors for the respective first and second electrodes, wherein the first and second electrodes extend from their respective charge collectors towards one another to form a junction at an interface there between, and wherein the substantially homogeneous mixture of the first electrode is configured to be sufficiently hydrophobic to prevent intermixing of the homogeneous mixture with the reduced graphene oxide of the second electrode in proximity to one or both of the respective charge collectors to prevent short circuiting of the spaced-apart charge collectors.
Abstract:
Described are an electrode precursor structure, an electrode obtainable from said electrode precursor structure, a process for preparing the electrode structure and an electrochemical cell comprising said electrode and the use of a polymer comprising UV-VIS cleavable bonds in the production of a release layer for electrode structures.
Abstract:
본 발명은 실리콘 이차전지에 관한 것으로, 더욱 상세하게는 고체 전해질을 갖는 고체형 실리콘 이차전지 및 이의 제조방법에 관한 것이다. 본 발명에 의하면, 이차전지의 리튬을 실리콘으로 대체함으로써, 제조 비용 감소 및 이차전지 폐기 시 환경 오염을 최소화할 수 있는 효과가 있다. 또한, 양극 또는 음극 물질을 다수 회 적층 압착하여 양극 또는 음극 활물질을 제조함으로써, 양극 또는 음극 활물질의 밀도를 증가시켜 전류 밀도 및 용량을 증가시킬 수 있는 효과가 있다. 또한, 양극 활물질 및 음극 활물질의 내부에 메쉬 플레이트를 내장시킴으로써 전자를 효율적으로 이동시킬 수 있는 효과가 있다. 또한, 실리콘 이차전지의 직렬 연결 시 연결되는 실리콘 이차전지의 전극을 공용화함으로써, 실리콘 이차전지 어셈블리의 두께를 감소시키고 출력 전압을 증대시킬 수 있는 효과가 있다. 또한, PCB 또는 칩과 일체로 형성되어 전원을 공급함으로써 순간 방전에 대한 백업 전원의 역할을 할 수 있는 효과가 있다.
Abstract:
A method of manufacturing an electrochemical cell (2)having a gel electrolyte. An electrochemical cell (2)is provided having cell casing(4), and a first electrode(6), a second electrode(8), an electrolyte solution and a temperature activated gelling agent disposed within the cell casing(4). A gel electrolyte comprising the electrolyte solution and the gelling agent is formed by passing a current through the electrochemical cell (2) such that the temperature of the gelling agent exceeds the activation temperature of the gelling agent.
Abstract:
Proton-conducting gel electrolytes with acid immobilized within a covalently cross-linked polymer network and composites containing the gel electrolytes provide low ionic resistance, minimize acid stratification, and prevent dendrite growth. The gel electrolytes can be formed from monomers dissolved in concentrated sulfuric acid and subsequently covalently cross-linked between the battery electrodes, or the covalently cross-linked gel electrolytes can be formed in water and subsequently exchanged into sulfuric acid. The mechanical properties of these gels can often be enhanced with the addition of silica powder, silica fiber, or other additives. In some cases, the covalently cross-linked gel electrolytes are formed in the presence of a conventional silica-filled polyethylene separator or within a low density fiber mat to provide mechanical reinforcement and controlled spacing between the battery electrodes. The covalently crosslinked gel electrolytes provide low ionic resistance, and increased power capacity of the battery, because the polymer networks can be formed at low concentrations (