All-Climate Aqueous Dual-Ion Hybrid Battery with Ultrahigh Rate and Ultralong Life Performance

Abstract

Aqueous sodium ion batteries (ASIBs) with the characteristics of long cycling life, all-climate compatibility, and low cost need to be developed urgently. Herein, a novel dual-ion battery baesd on Na+ and ClO4 – electrochemistry is proposed, consisting of an nano/microstructured Ni­(OH)2 (NNH) cathode, a carbon-coated NaTi2(PO4)3 (NTP@C) anode, and 2 M NaClO4 aqueous (aq.) electrolyte. In a charging process, sodium ions are inserted into NaTi2(PO4)3 to form Na3Ti2(PO4)3, and ClO4 – is stored in the electric double layers of the NNH cathode; in a reverse process, the Na+ is extracted from Na3Ti2(PO4)3 to form NaTi2(PO4)3, and the adsorption ClO4 – is released into the electrolyte. Because of the mechanism of the dual-ion reaction, the aqueous sodium-ion-based dual-ion hybrid battery (ASDHB) displays excellent rate performance, with a capacity of 82.3 mA h g–1 anode even at the ultrahigh rate of 50 C. Moreover, the ASDHB displays an ultralong cycling life at a wide temperature range (i.e., from −20 to 50 °C), even at a low temperature of −20 °C, the capacity retention is still as high as 85% after 10 000 cycles at the rate of 10 C. At the same time, it shows a high energy density of 40.1 Wh kg–1 total and power density of 257.7 W kg–1 total, indicating the potential application on electrial energy storage.

Compressed Nanolamella‐Stacked Ni(OH)2/NiCo2O4 Composite as Electrode for Battery‐Type Supercapacitor

“…The electrochemical performances of Ni(OH) 2 /NiCo 2 O 4 composite were evaluated by CV and GCD in 6 M KOH. Figure a was displayed the CV curves of Ni(OH) 2 /NiCo 2 O 4 electrode at different scan rates, which all shared a similar shape with a pair of the obvious redox peaks, indicating a good rate capability of the composite . It is noteworthy that the variations in redox peak position between low and high scan rate was only 0.023–0.027 V, which is much less than those of other similar materials (0.05–0.1 V or more), demonstrating the faster electrochemical behavior of this electrode .…”

A Low‐Temperature Sodium‐Ion Full Battery: Superb Kinetics and Cycling Stability

“…As illustrated in Figure 5d, the LT rate capability of our NTP/CF||NVP/CF cell is certainly brilliant, which outperforms most of the previous full cells such as NaV 1.25 Ti 0.75 O 4 (or hard carbon)||Na 0.8 Ni 0.4 Ti 0.6 O 2 , [ 18 ] hard carbon||Na 3 Fe 2 (PO 4 ) 3 , [ 19 ] and NTP@C||Ni(OH) 2 . [ 20 ] More remarkably, our designed NTP/CF||NVP/CF with enhanced Na + diffusivity displays an exceptional long‐term cyclability under low temperature (−20 °C) and high rate (>10 C), e.g., stabilizing at about 44 mA h g −1 (10 C, k = 73%) and 36 mA h g −1 (20 C, k = 60%) over 1000 cycles (Figure 5e), which brings an important step forward in the development of LT SIBs.…”

Aqueous Rechargeable Metal‐Ion Batteries Working at Subzero Temperatures

“…[ 54 ] An aqueous dual‐ion battery consisting of nano/microstructured Ni(OH) 2 cathode and carbon‐coated NaTi 2 (PO 4 ) 3 anode displays high capacity retention of 85% after 10 000 cycles at −20 °C in 2 m NaClO 4 electrolyte. [ 55 ]…”

“…Relative capacity retention versus temperature for representative ARMBs, [ 7,14,17,33,38,39,43,51–57 ] and organic electrolyte batteries. [ 54,58,60,65,66 ] Different shapes of the dots are used to represent different mechanisms and the notes for each dots are the key materials used to achieve the low‐temperature performances.…”