Ionic plastic crystals, compositions comprising same, methods for manufacturing same and uses thereof
The present technology relates to an ionic plastic crystal comprising at least one delocalized anion paired with at least one an organic guanidine, amidine or phosphazene organic superbase-derived cation for use in electrochemical applications, particularly in electrochemical accumulators such as batteries, electrochromic devices, and supercapacitors. The present technology also relates to an ionic plastic crystal composition, an ionic plastic crystal-based solid electrolyte composition, an ionic plastic crystal-based solid electrolyte, an electrode material comprising the ionic plastic crystal or the ionic plastic crystal composition. Their uses in electrochemical cells and electrochemical accumulators as well as their processes of manufacturing and an NHO-stabilized intermediary ion-neutral complex are also described.
1 . An ionic plastic crystal comprising at least one delocalized anion paired with at least one guanidine, amidine or phosphazene organic superbase-derived cation.
2 . The ionic plastic crystal according to claim 1 , wherein the delocalized anion is selected from the group consisting of trifluoromethanesulfonate (or triflate) [TfO] − , bis(trifluoromethanesulfonyl)imide [TFSI] − , bis(fluorosulfonyl)imide [FSI] − , 2-trifluoromethyl-4,5-dicyanoimidazolate [TDI] − , hexafluorophosphate [PF 6 ] − , and tetrafluoroborate [BF 4 ] − anions.
3 . The ionic plastic crystal according to claim 1 , wherein the cation is selected from the group consisting of guanidine, amidine or phosphazene organic superbase-derived cations of Formulae 2 to 8:
wherein,
the ionic plastic crystal is a monocationic ionic plastic crystal and R 1 is a hydrogen atom or a linear or branched substituent selected from a C 1 -C 10 alkyl-acrylate, a C 1 -C 10 alkyl-methacrylate, a carbonylamino-C 1 -C 10 alkyl-methacrylate, a carbonylamino-C 1 -C 10 alkyl-acrylate, a carbonyloxy-C 1 -C 10 alkyl-methacrylate, and a carbonyloxy-C 1 -C 10 alkyl-acrylate; or
the ionic plastic crystal is a multicationic ionic plastic crystal comprising at least two delocalized anions paired with at last two quanidine, amidine or phosphazene organic superbase-derived cations and R 1 is an unsubstituted or substituted organic bridging group separating at least two of the cations and is selected from a linear or branched C 1 -C 10 alkylene, a linear or branched C 1 -C 10 alkyleneoxyC 1 -C 10 alkylene, a linear or branched poly(C 1 -C 10 alkyleneoxy) C 1 -C 10 alkylene, a linear or branched polyether, a linear or branched polyester, a C 6 -C 12 arylene, a C 5 -C 12 heteroarylene, a C 3 -C 12 cycloalkylene, and a C 3 -C 12 heterocycloalkylene.
4 . The ionic plastic crystal according to claim 3 , wherein the ionic plastic crystal is selected from ionic plastic crystals of Formulae 10 to 16:
wherein,
X— is a delocalized anion selected from the group consisting of [TfO] − , [TFSI] − , [FSI] − , [TDI] − , [PF 6 ] − , and [BF 4 ] − ; and
the ionic plastic crystal is a monocationic ionic plastic crystal and R 1 a hydrogen atom or a linear or branched substituent selected from a C 1 -C 10 alkyl-acrylate, a C 1 -C 10 alkyl-methacrylate, a carbonylamino-C 1 -C 10 alkyl-methacrylate, a carbonylamino-C 1 -C 10 alkyl-acrylate, a carbonyloxy-C 1 -C 10 alkyl-methacrylate, and a carbonyloxy-C 1 -C 10 alkyl-acrylate; or
the ionic plastic crystal is a multicationic ionic plastic crystal comprising at least two delocalized anions paired with at least to quanidine, amidine or phosphazene organic superbase-derived cations and R 1 is an unsubstituted or substituted organic bridging group separating at least two of the cations and is selected from a linear or branched C 1 -C 10 alkylene, a linear or branched C 1 -C 10 alkyleneoxyC 1 -C 10 alkylene, a linear or branched poly(C 1 -C 10 alkyleneoxy) C 1 -C 10 alkylene, a linear or branched polyether, a linear or branched polyester, a C 6 -C 12 arylene, a C 5 -C 12 heteroarylene, a C 3 -C 12 cycloalkylene, and a C 3 -C 12 heterocycloalkylene.
5 . An ionic plastic crystal composition comprising at least one ionic plastic crystal as defined in claim 1 and at least one additional component, at least one polymer, or a combination of at least one additional component and at least one polymer.
6 . The ionic plastic crystal composition according to claim 5 , wherein the additional component is an inorganic particle.
7 . The ionic plastic crystal composition according to claim 5 , wherein the polymer is:
linear or branched;
crosslinked;
a polyether-type polymer; or
a block copolymer composed of at least one lithium-ion solvating segment and at least one cross-linkable segment, the lithium-ion solvating segment being selected from homo- or copolymers having repeating units of Formula 32:
wherein,
R 3 is selected from a hydrogen atom, a C 1 -C 10 alkyl group, and a —(CH 2 —O—R 4 R 5 ) group;
R 4 is (CH 2 —CH 2 —O) m ;
R 5 is selected from a hydrogen atom and a C 1 -C 10 alkyl group;
y is an integer selected from the range of 10 to 200,000; and
m is an integer selected from the range of 0 to 10.
8 . The ionic plastic crystal composition according to claim 5 , wherein the ionic plastic crystal composition is
(i) an ionic plastic crystal-based electrolyte composition,
(ii) comprised in a binder;
(iii) comprised in an electrochemical cell;
(iv) comprised in a supercapacitor; or
(v) comprised in an electrochromic material.
9 . A solid electrolyte composition comprising an ionic plastic crystal as defined in claim 1 and at least one salt or at least one additional component.
10 . The solid electrolyte composition according to claim 9 , wherein:
the salt is an ionic salt selected from the group consisting of a lithium salt, a sodium salt, a potassium salt, a calcium salt, and a magnesium salt; or
the additional component is selected from the group consisting of ionically conductive materials, inorganic particles, glass particles, ceramic particles, plasticizing agents, and a combination of at least two thereof or is selected from NASICON, LISICON, thio-LISICON type compounds, garnets, in crystalline and/or amorphous form, and a combination of at least two thereof.
11 . A solid electrolyte comprising a solid electrolyte composition as defined in claim 9 .
12 . An electrode material comprising an electrochemically active material and an ionic plastic crystal as defined in claim 1 .
13 . The electrode material according to claim 12 , wherein the electrochemically active material is in the form of particles or is selected from the group consisting of metal oxides, lithium metal oxides, metal phosphates, lithium metal phosphates, titanates, lithium titanates, metal fluorophosphates, lithium metal fluorophosphates, metal oxyfluorophosphates, lithium metal oxyfluorophosphates, metal sulfates, lithium metal sulfates, metal halides, lithium metal halides, sulfur, selenium, and a combination of at least two thereof.
14 . The electrode material according to claim 12 , wherein the electrode material further comprises at least one electronically conductive material.
15 . An electrode comprising an electrode material as defined in claim 12 on a current collector.
16 . An electrochemical cell comprising a negative electrode, a positive electrode and an electrolyte, wherein at least one of the negative electrode, the positive electrode, and the electrolyte comprises at least one ionic plastic crystal as defined in claim 1 .
17 . An electrochemical cell comprising a negative electrode, a positive electrode and an electrolyte, wherein at least one of the negative electrode, the positive electrode, and the electrolyte comprises the ionic plastic crystal composition as defined in claim 5 .
18 . An electrochemical cell comprising a negative electrode, a positive electrode, and an electrolyte, wherein at least one of the negative electrode and the positive electrode is as defined in claim 15 .
19 . An electrochemical cell comprising a negative electrode, a positive electrode, and a solid electrolyte as defined in claim 11 .
20 . An electrochemical accumulator comprising at least one electrochemical cell as defined in claim 16 .
21 . A process for the preparation of an ionic plastic crystal as defined in claim 1 , the process comprising the following steps:
(i) reacting at least one guanidine, amidine or phosphazene organic superbase with at least one proton source to form at least one complex including a protonated guanidine, amidine or phosphazene organic superbase-derived cation and a counterion; and
(ii) reacting the complex including a protonated guanidine, amidine or phosphazene organic superbase-derived cation and a counterion with at least one ionic salt.
22 . The process according to claim 21 , wherein:
steps (i) and (ii) are carried out sequentially, simultaneously or partially overlapping in time with each other; or
the quanidine, amidine or phosphazene organic superbase, the proton source and the ionic salt are mixed together and left o react; or
steps (i) and (ii) are carried out in the presence of a solvent; or
the proton source of step (i) is a first proton source and steps (i) and (ii) are carried out in the presence of a second source; or
steps (i) and (ii) are carried out in the presence of an activator, a stabilizer, or a combination thereof and the process further comprises forming a stabilized intermediary ion-neutral complex; or
steps (i) and (ii) are carried out at a temperature in the range from about 20° C. to about 200° C. upper and lower limits included; or
steps (i) and (ii) are carried out for at least 4 days.
23 . The process according to claim 22 , wherein the activator and/or stabilizer is a bis-silylated compound of Formula 17:
wherein,
Z is a substituted or unsubstituted organic group selected from a linear or branched C 1 -C 10 alkylene, a linear or branched C 1 -C 10 alkyleneoxyC 1 -C 10 alkylene, a linear or branched poly(C 1 -C 10 alkyleneoxy) C 1 -C 10 alkylene, a linear or branched polyether, a linear or branched polycarbonate, a linear or branched polythiocarbonate, a linear or branched polyamide, a linear or branched polyimide, a linear or branched polyurethane, a linear or branched polysiloxane, a linear or branched thioether, a linear or branched polyphosphazene, a linear or branched polyester, and a linear or branched polythioester; and
R 2 is independently and in each occurrence selected from the group consisting of an alkyl group, an aryl group, and an arylalkyl group.
24 . The process according to claim 21 , wherein the process further comprises at least of the following steps:
a purification step;
a functionalization step;
a step of coating the ionic plastic crystal composition or a suspension comprising the ionic plastic crystal on a substrate;
a step of driving the composition or suspension; and
a crosslinking step.
25 . A process for the preparation of an ionic plastic crystal as defined in claim 1 , the process comprising the following steps:
(i) reacting a guanidine, amidine or phosphazene organic superbase with an organic bridging compound to form a multicationic complex comprising at least two organic superbase-based cationic moieties separated by an unsubstituted or substituted organic bridging group and paired with a counterion; and
(ii) reacting the multicationic complex with at least one ionic salt.
26 . The process according to claim 25 , wherein:
the organic bridging compound comprises the unsubstituted or substituted organic bridging group and at least two anionic leaving groups; or
the unsubstituted substituted organic bridging group is selected from the group consisting of a linear or branched C 1 -C 10 alkylene, a linear or branched C 1 -C 10 alkyleneoxyC 1 -C 10 alkylene, a linear or branched poly(C 1 -C 10 alkyleneoxy)C 1 -C 10 alkylene, or linear or branched polyether, a linear or branched polyester, a C 6 -C 12 arylene, a C 6 -C 12 heteroarylene, a C 2 -C 12 cycloalkylene, and a C 2 -C 12 heterocycloalkylene; or
the organic bridging group is 1,2,4,5-tetrakis(bromomethyl)benzene; or
steps (i) and (ii) are carried out sequentially, simultaneously or partially overlapping in time with each other; or
the quanidine, amidine or phosphazene organic superbase, the organic bridging compound and the ionic salt are mixed together and left to react; or
steps (i) and (ii) are carried out in the presence of a solvent; or
the step of reacting the quanidine, amidine or phosphazene organic superbase with the organic bridging compound is carried out in the presence of a base; or
steps (i) and (ii) are carried out at room temperature; or
the step of reacting the guanidine, amidine or phosphazene organic superbase with the organic bridging compound is carried out for about 4 days; or
the step of reacting the multicationic complex with the ionic salt is carried out for about 3 days.
27 . The process according to claim 25 , wherein the process further comprises at least one of the following steps:
a purification step; and
a step of coating the ionic plastic crystal composition or a suspension comprising the ionic plastic crystal on a substrate.
28 . A process for the production of an electrode material as defined in claim 12 , the process comprising the following steps:
(ii) preparing a carbon and binder slurry;
(ii) preparing an ionic plastic crystal-based catholyte solution; and
(iii) preparing an ionic plastic crystal, carbon, and binder slurry.
29 . The process according to claim 28 , wherein the step of preparing a carbon and binder slurry comprises dispersing the carbon in a binder composition comprising a binder.
30 . The process according to claim 29 , wherein the process further comprises a step of preparing the binder composition.
31 . The process according to claim 28 , wherein:
the step of preparing the ionic plastic crystal catholyte solution comprises diluting the ionic plastic crystal and an ionic salt in a solvent; or
the step of preparing the ionic plastic crystal, carbon and binder slurry comprises the progressive addition of the ionic plastic crystal catholyte solution to the carbon and binder slurry; or
the process further comprises adding an electrochemically active material to the ionic plastic crystal, carbon, and binder slurry.
32 . The process according to claim 28 , wherein the process further comprises coating the ionic plastic crystal, carbon, and binder slurry on a current collector to obtain an ionic plastic crystal, carbon, and binder electrode film on a current collector.
33 . The process according to claim 32 , wherein the process further comprises at least one of the following steps:
a step of drying the ionic plastic crystal, binder, and carbon electrode film; and
a step of calendering the ionic plastic crystal, binder, and carbon electrode film.
34 . An electrochemical accumulator comprising at least one electrochemical cell as defined in claim 17 .
35 . An electrochemical accumulator comprising at least one electrochemical cell as defined in claim 18 .
36 . An electrochemical accumulator comprising at least one electrochemical cell as defined in claim 19 .