Boron Hydrogen Compounds: Hydrogen Storage and Battery Applications

Abstract

About 25 years ago, Bogdanovic and Schwickardi (B. Bogdanovic, M. Schwickardi: J. Alloys Compd. 1–9, 253 (1997) discovered the catalyzed release of hydrogen from NaAlH4. This discovery stimulated a vast research effort on light hydrides as hydrogen storage materials, in particular boron hydrogen compounds. Mg(BH4)2, with a hydrogen content of 14.9 wt %, has been extensively studied, and recent results shed new light on intermediate species formed during dehydrogenation. The chemistry of B3H8−, which is an important intermediate between BH4− and B12H122−, is presented in detail. The discovery of high ionic conductivity in the high-temperature phases of LiBH4 and Na2B12H12 opened a new research direction. The high chemical and electrochemical stability of closo-hydroborates has stimulated new research for their applications in batteries. Very recently, an all-solid-state 4 V Na battery prototype using a Na4(CB11H12)2(B12H12) solid electrolyte has been demonstrated. In this review, we present the current knowledge of possible reaction pathways involved in the successive hydrogen release reactions from BH4− to B12H122−, and a discussion of relevant necessary properties for high-ionic-conduction materials.

Recent Development in Nanoconfined Hydrides for Energy Storage

“…A series of notable advances have been observed for complex hydrides as well, although their details are beyond the scope of this review. In short, metal tetrahydridoaluminates/alanates [14,51]: LiAlH 4 [54,81,96,99,101,111,113,135,166,178], NaAlH 4 [33,45,50,69,74,82,[127][128][129]167,214,234,235], tetrahydridoborates/borohydrides [3,12,14,42]: LiBH 4 [42,45,47,54,56,70,78,81,87,89,91,93,99,100,104,106,108,120,123,130,…”

“…tetrahydridoborates/borohydrides [3,12,14,42]: LiBH4 [42,45,47,54,56,70,78,81,87,89,91,93,99,100,104,106,108,120,123,130,134,135,161,216,[230][231][236][237][238][239][240],…”

“…An overview of hydrogen economy and appropriate recommendations was discussed by Abe et al [10]. The state-of-the-art of boron-nitrogen compounds for energy storage was reviewed by Kumar et al [11] and Hagemann [12]. The solid-state materials used for hydrogen storage have been addressed by Lee et al [13], Hadjixenophontos et al [14], Broom and Hirscher [15], Comanescu [16], Kharbachi et al [17], Zheng et al [18] and He et al [19], among others.…”

Na2B11H13 and Na11(B11H14)3(B11H13)4 as potential solid-state electrolytes for Na-ion batteries

“…Hydridoborate compounds have attracted the interest of researchers in the past decades due to their rich chemistry and variety of compositions and structures. 1,2 These compounds have shown applicability in a number of different fields, such as medicinal chemistry, 3 military, 4 organic synthesis, 5,6 hydrogen storage [7][8][9] and as ionic conductors. 10,11 closo-Boranes, negatively charged hydridoborate clusters with a cage-like structure, form metal salts with high chemical and thermal stability as well as superionic conductivity of their respective metal cations at high temperatures.…”

“…Hydridoborate compounds have attracted the interest of researchers in the past decades due to their rich chemistry and variety of compositions and structures. 1,2 These compounds have shown applicability in a number of different fields, such as medicinal chemistry, 3 military, 4 organic synthesis, 5,6 hydrogen storage 7–9 and as ionic conductors. 10,11…”