CN106058309B - LiIHPN-xLiI solid electrolyte series and preparation method - Google Patents

LiIHPN-xLiI solid electrolyte series and preparation method Download PDF

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Publication number
CN106058309B
CN106058309B CN201610406323.XA CN201610406323A CN106058309B CN 106058309 B CN106058309 B CN 106058309B CN 201610406323 A CN201610406323 A CN 201610406323A CN 106058309 B CN106058309 B CN 106058309B
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liihpn
lii
solid electrolyte
xlii
series
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CN106058309A (en
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刘方超
傅正文
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Fudan University
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Fudan University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0085—Immobilising or gelification of electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention belongs to electrochemical technology field, specially a kind of LiIHPN-xLiI solid electrolyte series and preparation method.The present invention has synthesized new compound LiIHPN for the first time, and successfully obtains the single crystal samples of the compound.Using the single crystal samples of LiIHPN, the structural information of new compound LiIHPN is obtained.LiIHPN is a kind of novel lithium ion solid electrolyte, by the LiI for adding different proportion in LiIHPN, LiIHPN-xLiI (0≤x≤10) solid electrolyte series is obtained, LiIHPN-LiI room-temperature conductivity is 1.8*10 in solid electrolyte series‑6 Scm‑1, LiIHPN-LiI conductivity is 1.8*10 when 355K‑3 Scm‑1, it is a kind of novel solid electrolyte that can be used for all-solid-state battery.

Description

LiIHPN-xLiI solid electrolyte series and preparation method
Technical field
The invention belongs to electrochemical technology fields, and in particular to a kind of novel lithium iodide -3- hydroxypropionitrile compound: LiIHPN-xLiI (0≤x≤10) solid electrolyte series and preparation method.
Background technique
For a long time, the traditional energy Land use systems that people use bring huge pollution to environment, meanwhile, money The problems such as source shortage, greenhouse effects, is also outstanding day by day.As it can be seen that traditional energy resource structure and Land use systems has been increasingly difficult to suitable Answer the needs of human kind sustainable development.In order to efficiently, reasonably use non-renewable energy resources, and be able to maintain environment and ecology Balance, secondary chemical cell have obtained great development.But liquid secondary lithium battery is generally had using inflammable and explosive Solvent in use process, can cause cells burst even to explode.All solid state electrolyte can overcome organic molten well The inflammable problem of agent electrolyte, can effectively improve battery security.
Summary of the invention
The object of the present invention is to provide a kind of novel LiIHPN-xLiI (0≤x≤10) solid electrolytes efficiently, safe Series and preparation method.
Present invention firstly provides a kind of lithium iodide -3- hydroxypropionitrile compounds, contain Li element, I element, C element, N member Element, O element and H element, element ratio are Li:I:C:O:N:H=1:1:3:1:1:5, are abbreviated as LiIHPN, which has lithium The new compound of ionic conductivity.
The specific steps of above compound preparation are as follows: LiI (HPN)21:1 is mixed in molar ratio with LiI, and is heated to It 120-160 DEG C, stirs 70-100 hours, obtains colourless transparent oil liquid, solidify after cooling, obtain LiIHPN solid electrolytic Matter.
Above compound has specific mono-crystalline structures, and provides complete LiIHPN structural information by single crystal samples.
Above compound has certain lithium ion conductivity, room-temperature conductivity 2.3*10-8 Scm-1。
The present invention also provides a kind of solid electrolyte series, are the addition different mol ratio examples in above compound LiIHPN LiI(lithium iodide) obtain, be denoted as: LiIHPN-xLiI (0≤x≤10).Here, x indicates LiI(lithium iodide) mole contain Amount.It is preferred that 1≤x≤10.
Above-mentioned LiIHPN-xLiI (0≤x≤10) solid electrolyte series, according to the difference of LiI content, it is available not With the solid electrolyte of conductivity, wherein LiIHPN-LiI room-temperature conductivity is 1.8*10-6 S cm-1, conductivity is when 355K 1.8*10-3 S cm-1。
The present invention provides above-mentioned LiIHPN-xLiI (0≤x≤10) solid electrolyte preparation of serial, specific steps Are as follows:
LiIHPN is mixed with LiI by different mol ratio, and is heated to 110-160 DEG C, stirs 80-110 hours, obtains nothing Color transparent oily liquid solidifies after cooling and obtains LiIHPN-xLiI (0≤x≤10) solid electrolyte series of different proportion.
Since above-mentioned LiIHPN-xLiI (0≤x≤10) solid electrolyte has excellent conductivity, it can be used for Prepare all solid state lithium-sulfur cell.I.e. using sulphur as anode, lithium piece is as cathode, and LiIHPN-LiI solid electrolyte is as electrolysis Matter.
Detailed description of the invention
Fig. 1 is ionic conductivity-temperature curve of LiIHPN-LiI series in embodiment.
Fig. 2 is the XRD spectrum of LiIHPN-LiI series in embodiment.
Fig. 3 is all solid lithium sulphur battery charging and discharging curve in embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit The fixed present invention.
Embodiment
LiIHPN is mixed with LiI by different mol ratio, and is heated to 110-160 DEG C, and stirring obtained nothing after 80-110 hours Color transparent oily liquid solidifies after cooling and obtains LiIHPN-xLiI (0≤x≤10) solid electrolyte series of different proportion.
Fig. 1 is ionic conductivity-temperature curve of the LiIHPN-LiI series of different LiI contents.LiIHPN-LiI series All show Arrhenius curvilinear characteristic well.The ionic conductivity of LiIHPN-LiI series solid electrolyte is with LiI content And increase.In 355K, the conductivity of LiI/LiIHPN=1 is up to 1.8*10-3 S/cm。
The data of bottom are the XRD spectrums using the LiIHPN of material studio simulation in Fig. 2.It is enumerated in Fig. 3 The XRD spectrum of the LiIHPN-LiI series of different LiI contents.The pure LiIHPN diffracting spectrum of black and reason in comparison diagram 3 By the XRD spectrum of simulation LiIHPN, it can be seen that the two has good consistency.
As shown in figure 3, all solid lithium sulphur battery provided by the invention includes: sulphur as anode, lithium piece as cathode, LiIHPN-LiI solid electrolyte is as electrolyte.Therefore, LiIHPN-LiI can be applied to all-solid-state battery field, be a kind of new The solid electrolyte of type.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (5)

1. a kind of compound with lithium ion conduction ability, which is characterized in that be lithium iodide -3- hydroxypropionitrile, contain Li member Element, I element, C element, N element, O element and H element, element ratio are Li:I:C:O:N:H=1:1:3:1:1:5, are abbreviated as LiIHPN。
2. the compound according to claim 1 with lithium ion conduction ability, which is characterized in that have lithium ion conductance Rate, room-temperature conductivity 2.3*10-8 Scm-1。
3. a kind of preparation method of the compound with lithium ion conduction ability as described in claim 1, it is characterised in that tool Body step are as follows: LiI (HPN)21:1 is mixed in molar ratio with LiI, and is heated to 120-160 DEG C, is stirred 70-100 hours, is obtained To colourless transparent oil liquid, solidifies after cooling, obtain LiIHPN solid electrolyte.
4. a kind of solid electrolyte series LiIHPN-xLiI, 0≤x≤10, which is characterized in that be described in claim 1ization It closes in object LiIHPN and adds additionally, the LiI of different mol ratio example is obtained, and is denoted as LiIHPN-xLiI, and 0≤x≤10, x are indicated The molar content of LiI.
5. a kind of solid electrolyte series LiIHPN-xLiI as claimed in claim 4, the preparation method of 0≤x≤10 is special Sign is specific steps are as follows: LiIHPN is mixed with LiI by different mol ratio, and is heated to 110-160 DEG C, stirring 80-110 is small When, colourless transparent oil liquid is obtained, solidifies after cooling and obtains.
CN201610406323.XA 2016-06-12 2016-06-12 LiIHPN-xLiI solid electrolyte series and preparation method Expired - Fee Related CN106058309B (en)

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CN106058309B true CN106058309B (en) 2019-02-26

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