Nickel-iron layered double hydroxides for an improved Ni/Fe hybrid battery-electrolyser

Abstract

The transition to renewable electricity sources and green feedstock implies the development of electricity storage and conversion systems to both stabilise the electricity grid and to provide electrolytic hydrogen. We...

A Tale of Nickel-Iron Batteries: Its Resurgence in the Age of Modern Batteries

“…The Ni(OH)2 has two naturally occurring crystalline polymorphs-the hydrotalcitelike α-phase and the brucite-like β-phase (Figure 4). The α-phase is composed of positively charged Ni(OH)2 layers where water molecules and anions (typically counter-ions of Ni salts used for electrode synthesis) intercalate [18,35]. When charging, the α-Ni(OH)2 undergoes a transformation to γ-NiOOH with little volume change due to their similar structure and interstitial spacing (~7 Å) [57].…”

“…This α↔γ transformation yields a high electron transfer of ~1.67 [58], which contributes to the high theoretical energy density of α-Ni(OH)2 of around 482 mAh g −1 [35]. While this is an impressive feat, the α-Ni(OH)2 is less preferred as cathode material The α-phase is composed of positively charged Ni(OH) 2 layers where water molecules and anions (typically counter-ions of Ni salts used for electrode synthesis) intercalate [18,35]. When charging, the α-Ni(OH) 2 undergoes a transformation to γ-NiOOH with little volume change due to their similar structure and interstitial spacing (~7 Å) [57].…”

“…Because of these, lead-acid ba ies have superseded Ni-Fe batteries due to the former's cheaper operating and mai nance costs, and LIBs have become popular with their high capacity (Figure 1) [11-Commercial lead acid batteries and LIBs have a specific energy of 30-35 Wh kg −1 and Wh kg −1 [14] which significantly outperforms commercial Ni-Fe batteries having o around 19-55 Wh kg −1 [15]. Despite these limitations, there is a renewed interest in N batteries, primarily driven by the clean and low-cost materials, longevity, and tolera to electrical abuse [16][17][18]. Eliminating the drawbacks is challenging, but improvem using nanomaterials are gaining traction after achieving ultrafast charge and disch rates by nearly a thousand-fold compared to commercial counterparts [16].…”

Simultaneous Determination of Doxorubicin and Dasatinib by using Screen-Printed Electrode/Ni–Fe Layered Double Hydroxide

“…The calcination of mixed hydroxides leads to mixed oxide materials that show very interesting features . Their acid–base sites and redox properties can be tailored for specific applications in catalysis, water splitting, biosorbents, fire retardancy, and electrochemistry. − Also, Ni–Fe LDHs have attracted particular interest in electrochemical applications because of their low cost, good redox activity, and eco-friendly properties. , Various reported studies showed that Ni–Fe LDHs have good electrocatalytic activity in electrochemical sensing applications. − …”

“…40−46 Also, Ni−Fe LDHs have attracted particular interest in electrochemical applications because of their low cost, good redox activity, and eco-friendly properties. 47,48 Various reported studies showed that Ni−Fe LDHs have good electrocatalytic activity in electrochemical sensing applications. 49−52 The aims of this work were to synthesize a Ni−Fe layered double hydroxide (Ni−Fe LDH) nanosheet and assess its applicability for the modification of a screen-printed electrode (SPE).…”