LiBH4-NaX (X=Cl, I) composites with enhanced lithium ionic conductivity

Xiang, Mengyuan; Zhang, Yao; Lin, Huaijun; Zhu, Yunfeng; Guo, Xinli; Chen, Jian; Li, Liquan

doi:10.1016/j.jallcom.2018.06.091

Cited by 13 publications

(10 citation statements)

References 26 publications

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“…One method to solve this problem is to use the interactions from first-principles electronic structure theory (also named "ab initio molecular dynamics" or AIMD), e.g., density functional theory. 303 However, solving the electronic structure itself is much more intensive compared with evaluating the Newton equation for MD simulations. Therefore, for large systems, such a method is not applicable at the moment.…”

Section: Remarks On the Predictive Models For Ion Transport In Compos...mentioning

confidence: 99%

Mobile Ions in Composite Solids

et al. 2020

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Fast ion conduction in solid-state matrices constitutes the foundation for a wide spectrum of electrochemical systems that use solid electrolytes (SEs), examples of which include solid-state batteries (SSBs), solid oxide fuel cells (SOFCs), and diversified gas sensors. Mixing different solid conductors to form composite solid electrolytes (CSEs) introduces unique opportunities for SEs to possess exceptional overall performance far superior to their individual parental solids, thanks to the abundant chemistry and physics at the new interfaces thus created. In this review, we provide a comprehensive and in-depth examination of the development and understanding of CSEs for SSBs, with special focus on their physiochemical properties and mechanisms of ion transport therein. The origin of the enhanced ionic conductivity in CSEs relative to their single-phase parents is discussed in the context of defect chemistry and interfacial reactions. The models/theories for ion movement in diversified composites are critically reviewed to interrogate a general strategy to the design of novel CSEs, while properties such as mechanical strength and electrochemical stability are discussed in view of their perspective applications in lithium metal batteries and beyond. As an integral component of understanding how ions interact with their composite environments, characterization techniques to probe the ion transport kinetics across different temporal and spatial time scales are also summarized.

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Section: Remarks On the Predictive Models For Ion Transport In Compos...mentioning

confidence: 99%

Mobile Ions in Composite Solids

et al. 2020

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“…The extension of composite studies to Li(BH 4 ) 3 I resulted in similar improvements [33]. Other composites that yielded varying degrees of conductivity improvements, albeit less than those achieved with the [34], NaBH 4 [35], with hydrides such as MgH 2 [36], or borohydride-hydride ternary mixtures [37], and mixtures with halides such as NaCl [38].…”

Section: Development Of Highly Conductive Solid Electrolytesmentioning

confidence: 88%

Beyond Typical Electrolytes for Energy Dense Batteries

Mohtadi¹

2020

Molecules

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The ever-rising demands for energy dense electrochemical storage systems have been driving interests in beyond Li-ion batteries such as those based on lithium and magnesium metals. These high energy density batteries suffer from several challenges, several of which stem from the flammability/volatility of the electrolytes and/or instability of the electrolytes with either the negative, positive electrode or both. Recently, hydride-based electrolytes have been paving the way towards overcoming these issues. Namely, highly performing solid-state electrolytes have been reported and several key challenges in multivalent batteries were overcome. In this review, the classes of hydride-based electrolytes reported for energy dense batteries are discussed. Future perspectives are presented to guide research directions in this field.

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“…Further, Kim et al [ 14 ] demonstrated that with deficiencies on the Li and H sites in Li 2 B 12 H 12 , ionic conductivities can be improved by three orders of magnitude [ 14 ]. Other studies on solid electrolytes with the BH 4 − allomorph have demonstrated their feasibility for competitive ionic conduction (but with a narrower electrochemical window relative to sulfide and phosphate class of solid electrolyte materials) [ 15 , 16 , 17 , 18 , 19 , 35 ].…”

Section: Borohydrides As Solid-state Electrolytesmentioning

confidence: 99%

“…Figure 3 is reproduced from the work by Lu et al [ 10 ] and shows an assessment (in spider diagram) of how well the materials perform as battery electrolytes with respect to ionic conduction, dendrite formation, and width of the electrochemical window (which is defined by anodic reaction and electrochemical oxidation potentials) [ 10 ]. Like Lu et al [ 10 ], many others have undertaken comprehensive engineering studies on borohydride materials, showing their promise for solid-state battery applications [ 6 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. This overview article examines some of the scientific underpinnings for these performance metrics in borohydride solid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Overview of the Structure–Dynamics–Function Relationships in Borohydrides for Use as Solid-State Electrolytes in Battery Applications

Dobbins

2021

Molecules

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The goal of this article is to highlight crucial breakthroughs in solid-state ionic conduction in borohydrides for battery applications. Borohydrides, Mz+BxHy, form in various molecular structures, for example, nido-M+BH4; closo-M2+B10H10; closo-M2+B12H12; and planar-M6+B6H6 with M = cations such as Li+, K+, Na+, Ca2+, and Mg2+, which can participate in ionic conduction. This overview article will fully explore the phase space of boron–hydrogen chemistry in order to discuss parameters that optimize these materials as solid electrolytes for battery applications. Key properties for effective solid-state electrolytes, including ionic conduction, electrochemical window, high energy density, and resistance to dendrite formation, are also discussed. Because of their open structures (for closo-boranes) leading to rapid ionic conduction, and their ability to undergo phase transition between low conductivity and high conductivity phases, borohydrides deserve a focused discussion and further experimental efforts. One challenge that remains is the low electrochemical stability of borohydrides. This overview article highlights current knowledge and additionally recommends a path towards further computational and experimental research efforts.

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LiBH4-NaX (X=Cl, I) composites with enhanced lithium ionic conductivity

Cited by 13 publications

References 26 publications

Mobile Ions in Composite Solids

Mobile Ions in Composite Solids

Beyond Typical Electrolytes for Energy Dense Batteries

Overview of the Structure–Dynamics–Function Relationships in Borohydrides for Use as Solid-State Electrolytes in Battery Applications

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