Low-temperature and high-rate-charging lithium metal batteries enabled by an electrochemically active monolayer-regulated interface

Gao, Yue; Rojas, Tomás; Wang, Ke; Liu, Shuai; Wang, Daiwei; Chen, Tianhang; Wang, Haiying; Ngo, Anh T.; Wang, Donghai

doi:10.1038/s41560-020-0640-7

Cited by 305 publications

(242 citation statements)

References 48 publications

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“…The achieved performance outperforms the state-of-the-art results of Na and Li metal anodes cycling at low temperatures (≤−40ºC) shown in Supplementary Fig. 1 and Supplementary Table 1 [15][16][17][18] . We further illustrate a full cell with a capacity decay of less than 0.089% per cycle and a high average Coulombic e ciency (CE) over 99.5% for over 100 cycles at temperatures as low as −60°C.…”

Section: Mainmentioning

confidence: 71%

Extending the Low Temperature Operating Range of Sodium Metal Batteries with Acyclic/Cyclic Ether-Based Electrolytes

Wang

Thenuwara

Luo

et al. 2021

Preprint

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Despite the promise of sodium electrochemistry at ambient temperature, the performance of sodium metal batteries in frigid environments is hindered by high internal resistance and unstable solid electrolyte interphase (SEI), which strongly depends on the electrolyte composition. Here we present an electrolyte formulation consisting of acyclic/cyclic ethers as binary solvents and a compatible sodium salt, which is thermally stable down to − 150°C. This electrolyte not only provides low resistance but enables a protective SEI in cold environments. Long-term sodium-metal cycling is demonstrated at the gelid temperature of − 80°C, showing small overpotentials of ~ 150 mV for over 750 hours. Both X-ray photoelectron spectroscopy and cryogenic transmission electron microscopy are performed to elucidate the temperature-dependent chemistry of the interphase. Full cells are further demonstrated, exhibiting a low decay rate (< 0.089% per cycle) and a high average Coulombic efficiency (> 99.5%) at temperatures as low as − 60°C.

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Section: Mainmentioning

confidence: 71%

Extending the Low Temperature Operating Range of Sodium Metal Batteries with Acyclic/Cyclic Ether-Based Electrolytes

Wang

Thenuwara

Luo

et al. 2021

Preprint

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“…Investigations on Li/Na metal plating–stripping demonstrate that the LiF/NaF in SEI components is beneficial for uniform deposition. [ 12,22 ] Thereby, it is reasonable for stable Na plating–stripping on graphite. Moreover, the composition of SEI formed on graphite experiencing 100 cycles was consistent with that after 10 cycles (Figure 4c), indicating the high stability and strong integrity of SEI formed on the graphite electrode.…”

Section: Resultsmentioning

confidence: 99%

Dendrite‐Free and Long‐Cycling Sodium Metal Batteries Enabled by Sodium‐Ether Cointercalated Graphite Anode

Xiang

Feng

Cao

et al. 2021

Adv Funct Materials

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Stable and dendrite‐free Na metal plating–stripping is achieved on the graphite electrode. The sodium‐ether cointercalated graphite exhibits ultrahigh Na deposition efficiency of 99.86% over 900 cycles at a current density of 2 mA cm−2. The discharge process involves the [Na‐ether]+ cointercalation and Na deposition. Density functional theory calculations demonstrate that the cointercalated graphite is critical for uniform Na deposition and stable Coulombic efficiency, which is ascribed to both the robust binding sites to Na by the diglyme molecules and a low lattice mismatch for Na growth on the cointercalated graphite. Also, a full cell consisting of Na4Fe3(PO4)2(P2O7) cathode and 0.5 mAh cm−2 Na predeposited graphite anode shows excellent cycling stability. The full cell delivers a capacity of 95 mAh g−1 based on the weight of cathode materials, with a high capacity retention of 91% over 300 cycles.

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“…Charge and discharge curves at different current densities exhibit highly symmetric implying small polarization (Figure 4 d). [29] While, N,S‐C electrode just delivers a negligible discharge capacity (Figure S21). Moreover, ex‐situ EIS curve of FeS 2 /N,S‐C electrode displays a lower interface impedance at 0.3 V than that of N,S‐C (Figure S22; Table S3) [30] .…”

Section: Resultsmentioning

confidence: 99%

Ultra‐High Initial Coulombic Efficiency Induced by Interface Engineering Enables Rapid, Stable Sodium Storage

et al. 2021

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High initial coulombic efficiency is highly desired because it implies effective interface construction and few electrolyte consumption, indicating enhanced batteries life and power output. In this work, ah igh-capacity sodium storage material with FeS 2 nanoclusters ( % 1-2 nm) embedded in N, Sdoped carbon matrix (FeS 2 /N,S-C) was synthesized, the surface of which displays defects-repaired characteristic and detectable dot-matrix distributed Fe-N-C/Fe-S-C bonds.A fter the initial discharging process,t he uniform ultra-thin NaF-rich ( % 6.0 nm) solid electrolyte interphase was obtained, thereby achieving verifiable ultra-high initial coulombic efficiency ( % 92 %). The defects-repaired surface provides perfect platform, and the catalysis of dot-matrix distributed Fe-N-C/Fe-S-Cb onds to the rapid decomposing of NaSO 3 CF 3 and diethylene glycol dimethyl ether successfully accelerate the building of two-dimensional ultra-thin solid electrolyte interphase.D FT calculations further confirmed the catalysis mechanism. As ar esult, the constructed FeS 2 /N,S-C provides high reversible capacity (749.6 mAh g À1 at 0.1 Ag À1 )a nd outstanding cycle stability (92.7 %, 10 000 cycles,1 0.0 Ag À1 ). Especially,a tÀ15 8 8C, it also obtains ar eversible capacity of 211.7 mAh g À1 at 10.0 Ag À1 .A ssembled pouch-type cell performs potential application. The insight in this work provides abright way to interface design for performance improvement in batteries.

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Low-temperature and high-rate-charging lithium metal batteries enabled by an electrochemically active monolayer-regulated interface

Cited by 305 publications

References 48 publications

Extending the Low Temperature Operating Range of Sodium Metal Batteries with Acyclic/Cyclic Ether-Based Electrolytes

Extending the Low Temperature Operating Range of Sodium Metal Batteries with Acyclic/Cyclic Ether-Based Electrolytes

Dendrite‐Free and Long‐Cycling Sodium Metal Batteries Enabled by Sodium‐Ether Cointercalated Graphite Anode

Ultra‐High Initial Coulombic Efficiency Induced by Interface Engineering Enables Rapid, Stable Sodium Storage

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