Borohydride electro-oxidation in a molten alkali hydroxide eutectic mixture and a novel borohydride–periodate battery

Wang, Andrew; Gyenge, Előd L.

doi:10.1016/j.jpowsour.2015.02.007

Cited by 13 publications

(8 citation statements)

References 36 publications

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“…Cells with potassium hydroxide showed relatively poor performance based on the discharge voltage and the discharge time. 7,8 Phosphoric acid (2 M) cell had a relatively flat and stable discharge curve, though initially the voltage was lower than in 1 M sulfuric acid. This was attributed to the fact that the latter was a stronger acid providing a higher concentration of hydrogen ions (Figure 3a).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Periodates (IO 4 – ) are strong oxidants with the highest possible oxidation state for iodine. Periodic acid and its Na and K salts have been used in organic reactions. − The iodine(VII) and iodine(V) compounds show positive electrode potentials, which makes them a viable material for electrochemical storage. , Yet, there have been few reports on periodate-based electrodes, , where Na and K periodate cathodes have shown two-electron reduction to IO 3 – in the alkaline environment. There are also a few reports on IO 3 – -based electrodes. , A combination of KIO 3 cathode and H 2 SO 4 electrolyte has shown the reduction of IO 3 – to I 2 .…”

Section: Introductionmentioning

confidence: 99%

“…2−4 The iodine(VII) and iodine(V) compounds show positive electrode potentials, which makes them a viable material for electrochemical storage. 5,6 Yet, there have been few reports on periodate-based electrodes, 7,8 where Na and K periodate cathodes 7 have shown two-electron reduction to IO 3 − in the alkaline environment. There are also a few reports on IO 3 −based electrodes.…”

Section: ■ Introductionmentioning

confidence: 99%

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Development of High-Capacity Periodate Battery with Three-Dimensional-Printed Casing Accommodating Replaceable Flexible Electrodes

Wang

Meng

Chen

et al. 2018

ACS Appl. Mater. Interfaces

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We present the development of a novel battery comprising iron(III) periodate complex cathode and zinc anode. The periodate complex [HFe(IO)O] was prepared by a precipitation reaction between Fe(NO) and NaIO and was used in battery development for the first time. The periodate complex along with 14% carbon nanotubes and a polytetrafluoroethylene coating formed a stable flexible electrode, and the battery showed specific capacity as high as 300 mA h g. Compared to single-electron processes in conventional cathode reactions, the possibility to significantly enhancing the cathode specific capacity via a multielectron process associated with valence change from I(VII) to I is demonstrated. A novel three-dimensional printed reserve battery design comprising replaceable electrodes and acetic acid electrolyte is also presented.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of High-Capacity Periodate Battery with Three-Dimensional-Printed Casing Accommodating Replaceable Flexible Electrodes

Wang

Meng

Chen

et al. 2018

ACS Appl. Mater. Interfaces

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“…Another recent study managed to intercalate Br°and Cl°into graphite, offering a brilliant concept for designing a high-energy and safe battery 24 . Previous studies [25][26][27][28] attempt to use highvalence iodine like IO 4 − /IO 3 − involving an attractive multielectrons conversion upon redox in the battery. Although acidic electrolyte and heavy metal salts of the oxy acid of iodine 27,29 were introduced to enhance the stability of cathode 30 , a reversible battery is yet to be developed.…”

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confidence: 99%

A four-electron Zn-I2 aqueous battery enabled by reversible I−/I2/I+ conversion

et al. 2021

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Electrochemically reversible redox couples that embrace more electron transfer at a higher potential are the eternal target for energy storage batteries. Here, we report a four-electron aqueous zinc-iodine battery by activating the highly reversible I2/I+ couple (1.83 V vs. Zn/Zn2+) in addition to the typical I−/I2 couple (1.29 V). This is achieved by intensive solvation of the aqueous electrolyte to yield ICl inter-halogens and to suspend its hydrolysis. Experimental characterization and modelling reveal that limited water activity and sufficient free chloride ions in the electrolyte are crucial for the four-electron process. The merits of the electrolyte also afford to stabilize Zn anode, leading to a reliable Zn-I2 aqueous battery of 6000 cycles. Owing to high operational voltage and capacity, energy density up to 750 Wh kg−1 based on iodine mass was achieved (15–20 wt% iodine in electrode). It pushes the Zn-I2 battery to a superior level among these available aqueous batteries.

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“…Insoluble manganese-based salts and metal oxides have been widely used as electrode materials: LiMn 2 O 4 is a common cathode for lithiumion batteries [2–4] and supercapacitors [5,6]; MnO 2 serves as electrodes in zinc-carbon [7], alkaline batteries [8–11], and super-capacitors [12–14]. Periodates with discharge from IO4− to IO3− [15,16] in alkaline electrolytes, and IO3− based electrodes [17,18] with the final reduction to I 2 in acidic electrolytes, were reported. In general, both Mn(IV) and I(VII) are oxidizing, making their complex a potential material for the multi-electron process in electrodes.…”

Section: Introductionmentioning

confidence: 99%

High capacity aqueous periodate batteries featuring a nine-electron transfer process

Wang

Meng

Mitra

2019

Energy Storage Materials

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We present sodium manganese periodate (NaMnIO6) as a novel cathode material, which exhibited a nine-electron discharge process, for the development of high-performance aqueous battery systems. Purified carbon nanotubes (CNTs) were selected as conductive cathode additive. Along with an anion exchange membrane, acid-salt water dual electrolytes were used to reduce anode corrosion. NaMnIO6 showed a specific capacity as high as 750 mAh g−1 in prototype batteries, which was nearly 94% of the theoretical capacity. Different anode metals were studied and the Mg system showed the highest specific energy of 746Wh kg−1. Furthermore, these batteries fabricated using 3D-printed casings also feature replaceable electrodes once they are consumed.

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Borohydride electro-oxidation in a molten alkali hydroxide eutectic mixture and a novel borohydride–periodate battery

Cited by 13 publications

References 36 publications

Development of High-Capacity Periodate Battery with Three-Dimensional-Printed Casing Accommodating Replaceable Flexible Electrodes

Development of High-Capacity Periodate Battery with Three-Dimensional-Printed Casing Accommodating Replaceable Flexible Electrodes

A four-electron Zn-I2 aqueous battery enabled by reversible I−/I2/I+ conversion

High capacity aqueous periodate batteries featuring a nine-electron transfer process

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