Method of activating two-dimensional materials for multivalent/polyatomic-ion intercalation battery electrodes

a multivalent/polyatomicion intercalation and battery electrode technology, applied in the field of multivalent/polyatomicion batteries, can solve the problems of unfavorable insertion and diffusion, sluggish insertion/diffusion of these cations, and intrinsic difficulty in electrochemical storage of multivalent cations in insertion compounds, and achieve enhanced specific capacity and rate performance.

Inactive Publication Date: 2018-06-28
UNIV HOUSTON SYST
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Benefits of technology

[0008]In one embodiment, a method for activating two-dimensional host materials for a multivalent/polyatomic ion battery may include adding a pillaring salt in electrolyte. This process may be followed by in-situ electrochemically intercalating the pillaring ions, solvent molecules and multivalent/polyatomic ions into the van der Waals gap of host materials. After the activat...

Problems solved by technology

These results reflect the intrinsic difficulty of electrochemical storage of multivalent cations in insertion compounds.
These characteristics indicate the high polarization strength of multivalent cation, and result in strong electronic interaction between the cations and the negatively charged coordinating atoms in the insertion host, which in turn leads to unfavorable insertion and diffusion.
The insertion/diffusion of these cations are s...

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  • Method of activating two-dimensional materials for multivalent/polyatomic-ion intercalation battery electrodes
  • Method of activating two-dimensional materials for multivalent/polyatomic-ion intercalation battery electrodes

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[0046]The following examples are included to demonstrate particular aspects of the present disclosure. It should be appreciated by those of ordinary skill in the art that the methods described in the examples that follow merely represent illustrative embodiments of the disclosure. Those of ordinary skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific embodiments described and still obtain a like or similar result without departing from the spirit and scope of the present disclosure.

[0047]Electrochemical Activation of 1T-TiS2 for MgCl-Ion Storage

[0048]It is known that intercalating organic molecules or bulky ions can expand the layered materials by 10-60 Å. 1-butyl-1-methylpyrrolidinium ion (PY14+) was chosen as the pillaring material to expand TiS2 because of the bulky size and electrochemical stability of PY14+. 0.2 M PY14Cl is dissolved into a standard all-phenyl complex (APC) electrolyte. Cyclic voltammetry characte...

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Abstract

A method for activating two-dimensional host materials for a multivalent/polyatomic ion battery may include adding a pillaring salt in electrolyte. This process may be followed by in-situ electrochemically intercalating the pillaring ions, solvent molecules and multivalent ions into the van der Waals gap of host materials. After the activation process, the host material is transformed into an interlayer-expanded 2D material with significantly enhanced specific capacity and rate performance for multivalent ion intercalation.

Description

RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Patent Application No. 62 / 181,873 filed on Jun. 19, 2015, which is incorporated herein by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0002]This invention was made with government support under Grant No. N00014-13-1-0543 awarded by the Office of Naval Research. The government has certain rights in the invention.FIELD OF THE INVENTION[0003]This invention relates to multivalent / polyatomic-ion batteries. More particularly, to a method for activating two-dimensional materials as high-capacity and high-rate intercalation electrodes in such batteries.BACKGROUND OF INVENTION[0004]The first rechargeable magnesium battery was proposed in as early as 2000, which delivered an energy density only comparable to Ni—Cd batteries. Surprisingly, this material still represents one of the most successful cathode materials for rechargeable magnesium batteries after more than ten years of R&D in this field. F...

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Application Information

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IPC IPC(8): H01M4/04H01M4/136H01M4/1397H01M4/58H01M10/054
CPCH01M4/0445H01M4/136H01M4/1397H01M4/5815H01M10/054H01M4/13H01M4/139Y02E60/10
Inventor YAO, YANYOO, HYUN DEOG
Owner UNIV HOUSTON SYST
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