Bifunctional composite separator with redistributor and anion absorber for dendrites-free and fast-charging lithium metal batteries

Wang, Mengmeng; Wang, Junru; Si, Juntao; Chen, Fei; Cao, Kuo; Chen, Chunhua

doi:10.1016/j.cej.2021.132971

Cited by 24 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that the surface of lithium metal from the PP/LTO/PP separator is much smoother than that of lithium metal with the PP/PP separator, and no obvious lithium dendrites are observed on the lithium surface with the PP/LTO/PP separator, indicating that our LTO-modified separator can well inhibit the growth of lithium dendrites and stabilize the lithium surface. However, the mossy lithium dendrites are easily found on the lithium surface with the PP/PP separator, which is consistent with many reported results, − which indicates our effective design of LTO-based separator. In addition, Figure S12 shows the first and second CV scans between 2.0 and 4.0 V. The oxidation peak near 3.6 V in the figure corresponds to the Li + extraction from the LFP cathode, and the reduction peak near 3.3 V corresponds to the Li + insertion into the LFP cathode.…”

Section: Resultssupporting

confidence: 91%

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Liu

Wang

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Lithium metal is a highly potential anode material for developing high specific energy density battery systems, but the uncontrollable generation and growth of lithium dendrites upon plating/stripping reduces the reversible capacity of batteries and Coulombic efficiency and possibly leads to short circuit or even fire, all of which retard the commercial application of lithium metal batteries (LMBs). In this work, a modified separator with a thin layer of Li4Ti5O12 (LTO) inserted between two traditional polypropylene (PP) separators was presented to effectively eliminate the influence of lithium dendrites and improve the rate performance and lifetime of LMBs. Benefiting from the good wettability to the electrolyte, high conductivity of lithium ions, and quick depletion of lithium dendrites due to the insertion of lithium into the LTO lattice, LMBs with LTO-modified separator display excellent electrochemical performances, e.g., in the Li–Li cells, and an ultralong and stable operation over 1000 h at an areal current density of 0.5 mA/cm2 can be realized. More interestingly, in Li/LFP full cells, a high discharge capacity of 135 mAh/g at 1C with a lifetime over 600 cycles and 120 mAh/g at 5C with a lifetime over 300 cycles can be achieved. These inspiring results suggest a feasible route to achieve a safer, longer-life, and higher-rate LMB.

show abstract

Section: Resultssupporting

confidence: 91%

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Liu

Wang

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Furthermore, the cycling stability of cell assembled with MS|PE|Ag 2 S separators is also superior to most previously reported metal batteries with other modified separators under lean electrolyte condition (Table S4, Supporting Information). [51][52][53][54][55][56][57] Besides, to demonstrate the possibilities for practical application, the MS|PE|Ag 2 S separator was further evaluated in a 414.2 Wh kg −1 Li |NCM811 pouch cell (3.2 Ah) under extremely lean electrolyte condition (2.3 g Ah −1 ). The pouch cell comprises a high-areal-capacity NCM811 cathode (4.6 mAh cm −2 ) and a thin Li-foil (50 µm thick/10.2 mAh cm −2 ).…”

Section: Resultsmentioning

confidence: 99%

Boosting the Temperature Adaptability of Lithium Metal Batteries via a Moisture/Acid‐Purified, Ion‐Diffusion Accelerated Separator

Zhang

Liu

Gan

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

solutions, explorative studies of the electro-redox couples, with the concurrent high retrievable capacity, enlarged nominal voltage gap, and rapid reaction kinetics, hold the key to promote the energy-dense battery construction at the extreme power output. [1] For the lithium ion batteries, the energy densities of traditional formats (LiCoO 2 /LiFePO 4 cathodes and graphite anodes) have approached their theoretical limits. [2] Alternatively, the unit cell prototyping of the high-capacity Li metal anode with the nickel-rich cathode can achieve the enhanced level of energy densities at the device level. [3,4] When soaking this electrode couples in the conventional carbonate-based electrolytes, however, the Fermi-energy incompatibility at the multiscale interface would cause the uncontrollable dendrite growth on the metallic foil and cathode structure collapse upon the high-voltage cycling. [5] Therefore, the reliable operation of the energy-dense battery necessitates the harmony balance of the enlarged voltage gap and the interfacial stability at multiple scales, yet still remains challenging.As the most attractive cathode type of the practical relevance, nickel-rich (Ni content >0.8) layered oxides exhibit the merits of the large specific capacity (>200 mAh g −1 ), environmental benignity and relative lower cost as compared to the LiCoO 2 cathode. Despite of the dominant nickel occupancy in the layered oxides for elevating the Li storage sites, the increased nickel ratio adversely deteriorates the cycle performance. The transition metal (TM) layer of the oxide structure at the highvoltage charged states would oxidize the carbonate solvents in the presence of moisture, leading to serious self-discharge rates upon the high-temperature storage. [6] Additionally, the hydrofluoric acid (HF) formed by the decomposition of the lithium hexafluorophosphate (LiPF 6 ) salt aggravates the TM ions (Co 2+ , Ni 2+ , and Mn 2+ ) dissolution and structural collapse of the layered cathode, meanwhile the TM species would deposit on the anode surface and degrade the solid electrolyte interface (SEI). [7] So far, a plethora of mitigation strategies were implemented to insulate the direct contact of the oxide particles with the electrolyte, for instance the exquisite coatings with The reliable operation of Li metal batteries suffers from cathode collapse due to high-voltage cycling, interfacial reactivity of the Li deposits, self-discharge at the elevated temperatures, as well as the power output deterioration in low-temperature scenarios. In contrast to the individual electrode optimization, herein, a hetero-layered separator with an asymmetric functional coating on polyethylene is proposed in response to the aforementioned issues: On the face-to-cathode side, the hybrid layer of the molecular sieve and sulfonated melamine formaldehyde can scavenge the hydrofluoric acid and moisture residues from the carbonate electrolyte, maintaining the cathode robustness in both the high-voltage cycling or high-temperature storage scenarios; while...

show abstract

“…The cathode was formed using the phase-inversion tape casting method described in detail in ref. 34–38. The as-formed disk-shaped green electrode with a diameter of 18 mm was pre-sintered at 1100 °C for 2 h. A thin YSZ electrolyte film was applied onto the pre-sintered electrode via dip-coating, followed by sintering at 1400 °C for 5 h. Then, a slurry of LSM–YSZ with a weight ratio of 50 : 50 was screen printed onto the YSZ electrolyte surface followed by calcination at 1180 °C for 2 h. An as-prepared cell was further treated by exposing its cathode to flowing H 2 (3 vol% H 2 O) at 800 °C for 5 h to facilitate the exsolution of NiFe nanoparticles from the LSCrFN phase.…”

Section: Methodsmentioning

confidence: 99%

A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO₂ electrolysis

Wang

Shen

et al. 2022

Sustainable Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

Bifunctional composite separator with redistributor and anion absorber for dendrites-free and fast-charging lithium metal batteries

Cited by 24 publications

References 37 publications

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Boosting the Temperature Adaptability of Lithium Metal Batteries via a Moisture/Acid‐Purified, Ion‐Diffusion Accelerated Separator

A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO₂ electrolysis

Contact Info

Product

Resources

About

Bifunctional composite separator with redistributor and anion absorber for dendrites-free and fast-charging lithium metal batteries

Cited by 24 publications

References 37 publications

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Highly Active Depleting Agent of Lithium Enabled High-Rate and Long-Life Lithium Metal Batteries

Boosting the Temperature Adaptability of Lithium Metal Batteries via a Moisture/Acid‐Purified, Ion‐Diffusion Accelerated Separator

A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO2 electrolysis

Contact Info

Product

Resources

About

A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO₂ electrolysis