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Methods for electrochemical cell remediation

An electrochemical and battery technology, applied in the field of electrochemical battery repair, can solve problems such as investment in high-power consumption equipment

Active Publication Date: 2018-06-08
24M TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Still other methods involve electrolysis-based metal recovery, requiring high power consumption and large equipment investment while resulting in large amounts of unrecovered electrode components

Method used

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  • Methods for electrochemical cell remediation
  • Methods for electrochemical cell remediation
  • Methods for electrochemical cell remediation

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Embodiment Construction

[0021] Rechargeable batteries, such as lithium-ion batteries, exhibit capacity loss or "capacity fade" over the course of their useful life, eg, loss of cyclable lithium and / or electrical disconnection due to active materials. In lithium-ion batteries, the battery's entire lithium storage is provided by the positive ("cathode") active material. Lithium is lost through consumption in irreversible side reactions within Li-ion batteries, such as the formation of solid electrolyte interphase ("SEI") material or layers during the original charge cycle and during aging, storage, and / or cycling Continue to grow the SEI layer during the process. Lithium lost due to any side reactions in the battery appears non-stoichiometric to the cathode active material due to the fixed lithium budget of the battery. Capacity fade is manifested as a decrease in the ability of a battery to deliver charge at its rated voltage. Conventional methods of recycling conventional solid battery electrodes t...

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Abstract

Embodiments described herein relate generally to methods for the remediation or recycling of electrochemical cell electrodes, especially binderless semi-solid electrodes. The method includes obtainingan electrode material (110), rinsing at least a portion of the electrode material to remove a residue therefrom (130) and separating the electrode material into constituents for reuse (150).

Description

[0001] Cross References to Related Applications [0002] This application claims priority and the benefit of US Provisional Patent Application Serial No. 62 / 182,241, filed June 19, 2015, entitled "Methods for Electrochemical Cell Remediation," the disclosure of which is incorporated herein by reference in its entirety. [0003] background technical field [0004] Embodiments described herein relate generally to the repair of electrochemical cell electrodes. Background technique [0005] Batteries typically consist of solid electrodes, separators, electrolytes, and auxiliary components (eg, related to packaging, thermal management, cell balancing, consolidation of current carriers into terminals), and / or other such components. Battery electrodes typically contain active materials, conductive materials, binders such as polyvinylidene fluoride ("PVDF") and styrene-butadiene rubber ("SBR"), and other additives as a dry solid matrix The coating is calendered onto a metal substr...

Claims

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Application Information

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IPC IPC(8): H01M6/52H01M10/54
CPCH01M6/52H01M10/54Y02W30/84
Inventor 姜一民W·伍德福德H·Z·于
Owner 24M TECH INC