Tuning Na 3Hf 2Si 2PO 12 electrolyte surfaces by metal coating for high-rate and long cycle life solid-state sodium ion batteries

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

In this work, owing to the formed interphase between sodium and lead with good wettability and fast charge conductivity, the lead decorated Na ₃Hf ₂Si ₂PO ₁₂ (NHSP) exhibits superior interface stability.

Abstract

Solid-state sodium ion batteries have attracted wide attention due to their high energy density, low cost and high security. However, the poor contact and high interfacial resistance between sodium and the electrolyte seriously hindered their large-scale application. In this work, the surface of the Na ₃Hf ₂Si ₂PO ₁₂ (NHSP) electrolyte with a NASICON structure was regulated by various metal claddings, and the underlying mechanisms were investigated. We found that the interfacial reaction has an important effect on the wettability of the interface. The stronger the interfacial reaction, the better the interfacial wettability. Based on the above-mentioned theory, we chose lead as the interface modification element. Owing to the formed interphase between sodium and lead with good wettability and fast charge conductivity, the lead decorated NHSP exhibits superior interface stability to others. Consequently, the battery with the lead decorated NHSP can cycle stably for more than 2400 hours at room temperature and the critical current density can reach 2.5 mA cm ⁻² at 60 °C. This work represents an effective avenue to address the interfacial challenges between sodium and solid electrolyte and providing opportunities to use in solid-state sodium ion battery in the future.

Related collections

Most cited references 43

Record: found
Abstract: found
Article: found

Is Open Access

Ultrastructural Characterization of the Lower Motor System in a Mouse Model of Krabbe Disease

Valentina Cappello, Laura Marchetti, Paola Parlanti … (2016)

Krabbe disease (KD) is a neurodegenerative disorder caused by the lack of β- galactosylceramidase enzymatic activity and by widespread accumulation of the cytotoxic galactosyl-sphingosine in neuronal, myelinating and endothelial cells. Despite the wide use of Twitcher mice as experimental model for KD, the ultrastructure of this model is partial and mainly addressing peripheral nerves. More details are requested to elucidate the basis of the motor defects, which are the first to appear during KD onset. Here we use transmission electron microscopy (TEM) to focus on the alterations produced by KD in the lower motor system at postnatal day 15 (P15), a nearly asymptomatic stage, and in the juvenile P30 mouse. We find mild effects on motorneuron soma, severe ones on sciatic nerves and very severe effects on nerve terminals and neuromuscular junctions at P30, with peripheral damage being already detectable at P15. Finally, we find that the gastrocnemius muscle undergoes atrophy and structural changes that are independent of denervation at P15. Our data further characterize the ultrastructural analysis of the KD mouse model, and support recent theories of a dying-back mechanism for neuronal degeneration, which is independent of demyelination.

0 comments Cited 2374 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Is Open Access

New horizons for inorganic solid state ion conductors

Zhizhen Zhang, Yuanjun Shao, Bettina Valeska Lotsch … (2018)

This critical review presents the state of the art research progress, proposes strategies to improve the conductivity of solid electrolytes, discusses the chemical and electrochemical stabilities, and uncovers future perspectives for solid state batteries. Among the contenders in the new generation energy storage arena, all-solid-state batteries (ASSBs) have emerged as particularly promising, owing to their potential to exhibit high safety, high energy density and long cycle life. The relatively low conductivity of most solid electrolytes and the often sluggish charge transfer kinetics at the interface between solid electrolyte and electrode layers are considered to be amongst the major challenges facing ASSBs. This review presents an overview of the state of the art in solid lithium and sodium ion conductors, with an emphasis on inorganic materials. The correlations between the composition, structure and conductivity of these solid electrolytes are illustrated and strategies to boost ion conductivity are proposed. In particular, the high grain boundary resistance of solid oxide electrolytes is identified as a challenge. Critical issues of solid electrolytes beyond ion conductivity are also discussed with respect to their potential problems for practical applications. The chemical and electrochemical stabilities of solid electrolytes are discussed, as are chemo-mechanical effects which have been overlooked to some extent. Furthermore, strategies to improve the practical performance of ASSBs, including optimizing the interface between solid electrolytes and electrode materials to improve stability and lower charge transfer resistance are also suggested.