Tailoring Ultrafast and High‐Capacity Sodium Storage via Binding‐Energy‐Driven Atomic Scissors

Abstract

Controllably tailoring alloying anode materials to achieve fast charging and enhanced structural stability is crucial for sodium‐ion batteries with high rate and high capacity performance, yet remains a significant challenge owing to the huge volume change and sluggish sodiation kinetics. Here, a chemical tailoring tool is proposed and developed by atomically dispersing high‐capacity Ge metal into the rigid and conductive sulfide framework for controllable reconstruction of GeS bonds to synergistically realize high capacity and high rate performance for sodium storage. The integrated GeTiS3 material with stable Ti–S framework and weak GeS bonding delivers high specific capacities of 678 mA h g−1 at 0.3 C over 100 cycles and 209 mA h g−1 at 32 C over 10 000 cycles, outperforming most of the reported alloying type anode materials for sodium storage. Interestingly, in situ Raman, X‐ray diffraction (XRD), and ex situ transmission electron microscopy (TEM) characterizations reveal the formation of well‐dispersed NaxGe confined in the rigid Ti–S matrix with suppressed volume change after discharge. The synergistically coupled alloying‐conversion and surface‐dominated redox reactions with enhanced capacitive contribution and high reaction reversibility by a binding‐energy‐driven atomic scissors method would break new ground on designing a high‐rate and high‐capacity sodium‐ion batteries.

Bimetal Modulation Stabilizing a Metallic Heterostructure for Efficient Overall Water Splitting at Large Current Density

“…Remarkably, the electrical resistivities of Mo 2 S 3 and Mo 2 S 3 @NiMo 3 S 4 decreased with reduced temperature, indicating that both of them are metallic. [ 45,46 ] Further characterization by UPS spectra at low energy onset regions of Mo 2 S 3 , NiMo 3 S 4 , and Mo 2 S 3 @NiMo 3 S 4 confirmed the metallic properties of Mo 2 S 3 and Mo 2 S 3 @NiMo 3 S 4 (Figure 2c).…”

Expeditious Electrochemical Synthesis of Mesoporous Chalcogenide Flakes: Mesoporous Cu2Se as a Potential High‐Rate Anode for Sodium‐Ion Battery

“…This value is comparable with the most recent Cu 2 Se and other chalcogenide materials tested in NIBs (in the range of 70–100%). [ 16,50–56 ]…”

“…This value is comparable with the most recent Cu 2 Se and other chalcogenide materials tested in NIBs (in the range of 70-100%). [16,[50][51][52][53][54][55][56] The rate performance was then investigated for further assessment of the electrochemical performance (Figure 4d). The non-porous sample delivers the reversible specific capacities of 388, 259, 238, and 239 mAh g −1 at 100, 200, 500, and 1000 mA g −1 , respectively.…”

Anionic Activity in Fast-Charging Batteries: Recent Advances, Prospects, and Challenges

“…Ex situ TEM observations indicate the emergence of well-dispersed Na x Ge encapsulated in the stable Ti−S matrix with alleviated volume variation after sodiation. 80 Introducing atomically dispersed M2-type metal into a stable matrix is an impressive technique for suppressing M2-type metal volume variations during cycling and maximizing the sodiation capacity.…”

“…As fast-charging and large-capacity rechargeable batteries have become increasingly significant components of electric vehicles, tremendous efforts have been devoted to synergistically coupling alloying-type materials with enhanced pseudocapacitive behavior and high reaction reversibility. ,− …”