The highly stable aqueous solution of sodium dodecahydro- closo -dodecaborate Na 2 B 12 H 12 as a potential liquid anodic fuel

Pylypko, Sergii; Ould-Amara, Salem; Zadick, Anicet; Petit, Eddy; Chatenet, Marian; Cretin, Marc; Demirci, Umit B.

doi:10.1016/j.apcatb.2017.09.068

Cited by 13 publications

(33 citation statements)

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“…As closo-Na 2 B 12 H 12 can also be synthesized cost-effectively from NaBH 4 , 25,26 our results show that hydroborate electrolytes can be made economically viable for all-solid-state batteries.…”

Section: Introductionmentioning

confidence: 75%

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

et al. 2020

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Closo-borates and carba-closo-borates recently emerged as a promising class of solid electrolytes for all-solid-state batteries, but are too expensive. Here we introduce NaB 11 H 14 nido-borates as a new building block for solid electrolytes that can be synthesized via a costeffective low-temperature method using cheap NaBH 4 as a chemical feedstock. We employ 2D nuclear magnetic resonance techniques to analyze the structure of this new building block. High ionic conductivity of up to 4 mS/cm at 20 C is achieved by combining nido-NaB 11 H 14 with closo-Na 2 B 12 H 12 into cubic unit cells. Importantly, Na 2 B 12 H 12 can also be synthesized costeffectively from NaBH 4. Crystal structures are solved and refined by synchrotron X-ray diffraction and density functional theory. Cyclic voltammetry reveals electrochemical stability from 0.15 to 2.6 V vs Na/Na +. Galvanostatic cycling in symmetrical cells with sodium metal electrodes shows only a small overpotential increase from 2 mV to 2.5 mV after 400 cycles at 50 A/cm 2. We also discuss how our results can be translated to render lithium solid electrolytes economically viable.

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Section: Introductionmentioning

confidence: 75%

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

et al. 2020

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“…The discussion below is thus based on the literature dedicated to NaBH 4 , 29−31 NaB 3 H 8 , 13 and NaB 12 H 12 . 14…”

Section: Resultsmentioning

confidence: 99%

“…The concentration of NaOH was set at 0.1 M and the concentration of the sample at 0.001 M. The voltammogram resembles that recorded for NaB 12 H 12 with the same electrode. 14 For the forward scan, there are two oxidation peaks. They are in the region of adsorption/desorption of atomic hydrogen on the electrode surface: a Pt1 at −0.73 V versus the saturated calomel electrode (SCE) and a Pt2 at −0.6 V versus SCE.…”

Section: Resultsmentioning

confidence: 99%

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Assessing the Potential of Sodium 1-Oxa-nido-dodecaborate NaB₁₁H₁₂O for Energy Storage

et al. 2018

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In the recent years, polyborate anions have been considered as possible candidates for energy. In aqueous solutions, they have been studied as either hydrogen carriers or anodic fuels. In the solid state (as an alkali salt), they have been seen as solid electrolytes. Herein, we focus on sodium 1-oxa- nido -dodecaborate NaB 11 H 12 O, a novel possible candidate for the aforementioned applications. The compound is soluble in water, and its stability depends on pH: under acidic conditions, it readily hydrolyzes while liberating hydrogen, and under alkaline conditions, it is stable, which is a feature searched for an anodic fuel. Over bulk platinum, gold, or silver electrode, oxidation takes place. The best performance has been noticed for the silver electrode. In the solid state, NaB 11 H 12 O shows Na + conductivity at a high temperature of up to 150 °C. All of these properties are presented in detail, and hereafter they are discussed while giving indications of what have to be developed to open up more realistic prospectives for NaB 11 H 12 O in energy.

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“…51 This is also the case for Na 2 B 12 H 12 that can be obtained by solvothermal decomposition of NaB 3 H 8 . 136,173 In fact, there are different methods for synthesizing such polyborane. Many of them are based on the oxidation of NaBH 4 (or another alkali borohydride like LiBH 4 ).…”

Section: Sodium Borohydride a Key Chemical Precursormentioning

confidence: 99%

Sodium borohydride for the near-future energy: a ''rough diamond'' for Turkey

Demirci¹

2018

Turk J Chem

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Boron-based materials are potential solutions in the field of energy. They have been regarded as hydrogen storage materials, liquid fuels of direct liquid-fed fuel cells (DLFCs), electrolytes of battery, and/or energetic substances.A typical example is sodium borohydride (NaBH 4) . In sodium hydroxide-stabilized aqueous solutions, it is seen as an efficient H 2 generator or a performing fuel of DLFCs. Actually, it plays a wider role; it is also the precursor of several boron-based materials of interest in the field of energy. In other words, it is indirectly considered for other energy applications, i.e. solid electrolytes of all solid-state batteries and hypergolic fuel. De facto sodium borohydride has become a key material in the field of energy. This is discussed in the present article, and it is highlighted that sodium borohydride may be clearly seen as a "rough diamond" for Turkey.

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The highly stable aqueous solution of sodium dodecahydro- closo -dodecaborate Na 2 B 12 H 12 as a potential liquid anodic fuel

Cited by 13 publications

References 45 publications

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

Assessing the Potential of Sodium 1-Oxa-nido-dodecaborate NaB₁₁H₁₂O for Energy Storage

Sodium borohydride for the near-future energy: a ''rough diamond'' for Turkey

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The highly stable aqueous solution of sodium dodecahydro- closo -dodecaborate Na 2 B 12 H 12 as a potential liquid anodic fuel

Cited by 13 publications

References 45 publications

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

Nido-Borate/Closo-Borate Mixed-Anion Electrolytes for All-Solid-State Batteries

Assessing the Potential of Sodium 1-Oxa-nido-dodecaborate NaB11H12O for Energy Storage

Sodium borohydride for the near-future energy: a ''rough diamond'' for Turkey

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Assessing the Potential of Sodium 1-Oxa-nido-dodecaborate NaB₁₁H₁₂O for Energy Storage