A simple strategy that may effectively tackle the anode-electrolyte interface issues in solid-state lithium metal batteries

Liu, Bo; Du, Mingjie; Chen, Bingbing; Zhong, Yijun; Zhou, Jianqiu; Ye, Fei; Liao, Kaiming; Zhou, Wei; Cao, Chencheng; Cai, Rui; Shao, Zongping

doi:10.1016/j.cej.2021.131001

Cited by 43 publications

(31 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The third flattened tail was attributed to the polarization of the symmetric cell at low frequencies, where the Li stripping and plating occurred on a time scale of 0.005–1 s. The interface impedance was calculated to be approximately 15 Ω cm 2 . The critical current density performance (Figure b) of the Ta5Li6 production pellet was as high as 1.28 mA cm –2 (0.64 mAh cm –2 ) under a time-fixed testing method, which was comparable to that measured with coating layers in published works. − The internal resistance of the symmetric cell was maintained at approximately 220 Ω cm 2 before the short circuit, indicating there was no soft short circuit inside Ta5Li6 ceramic solid electrolyte . Interestingly, the internal resistance varied from 50 to 150 Ω cm 2 after short circuit, indicating a repeatedly short-recovery procedure inside LLZO ceramics at current densities higher than 1.28 mA cm –2 .…”

Section: Resultsmentioning

confidence: 99%

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

Zhou

Yang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Solid-state electrolytes are key materials for developing high-safety solid-state Li-ion batteries. The garnettype Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolyte is one of the most promising solid electrolytes due to its high conductivity and feasible preparation in ambient air. Among several dopants, Tadoped LLZO (Ta-LLZO) delivers high stability against lithium metal and high conductivity, which attracts lots of researchers. However, production of Ta-LLZO ceramics is less problematic due to the complicated gas−liquid−solid sintering mechanism. This work aims to develop an efficient method to produce Ta-LLZO solid electrolyte ceramic pellets, including providing a stacking sintering method and optimizing the amount of excessive Li source, the wet milling duration, and the sintering temperature. First, a low-cost, efficient "gravel-separator" strategy is provided for multiple sintering of LLZO. Second, the Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (Ta5) samples with different excessive Li levels (2, 4, 6, and 8%) are sintered at various sintering conditions of 1240 °C for 60 min, 1280 °C for 20 min, and 1320 °C for 2 min to search for the optimum excessive amount of Li. Third, Ta5 samples with optimized excessive Li (4, 6%) after milling for longer duration are sintered at 1280 °C for 30 min, 1300 °C for 10 min, 1320 °C for 10 min, 1320 °C for 30 min to finally optimize the preparation craft. After optimization, the Ta5 ceramics with excessive 4 and 6% Li sintered at 1320 °C for 10 min deliver homogeneous and dense crosssectional morphology, high conductivity of over 1 × 10 −3 S cm −1 at room temperature, and relative densities of above 96%. Furthermore, symmetric Li cells assembled with the Ta-LLZO solid electrolyte prepared with the optimized method deliver a critical current density of 1.28 mA cm −2 at 30 °C and over 1000 h of stable cycling at 0.2 mA cm −2 (0.2 mA h cm −2 ) at 30 °C.

show abstract

Section: Resultsmentioning

confidence: 99%

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

Zhou

Yang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The capacity and high-rate performance were comparable to other solid-state Li batteries with LiFePO 4 cathodes and garnet-type oxide electrolytes reported in the recent literature (comparison is provided in Table S1). ,,,− The full battery also demonstrated a decent cycling stability at 0.5 C (Figure S8). This indicated the decent capacity retention and excellent reversibility of electrochemical reactions involved in the cathode and the anode.…”

Section: Resultsmentioning

confidence: 95%

“…These works tried to address the issue by post-treatment of the electrolyte at high temperatures, by physically polishing the surface of the electrolyte in inert atmospheres or by chemical modification . Some works tried to produce a new surface that shows improvement in the wettability of molten Li by the construction of an artificial interlayer (i.e., ZnO, ZnNO 3 , and lithium phosphorus oxynitride). − Recently, some reports including the one from our research group indicate that the integration of functional components (e.g., graphite, g-C 3 N 4 , Si 3 N 4 , MoO 3 , and LLTO) into the molten Li was also highly effective to improve the wettability of the mixture on the garnet electrolyte. The aforementioned works improved the ionic transfer across the anode–electrolyte interface which, typically, has a two-dimensional surface-to-surface contact; that is, bulk metallic lithium on the anode could not be involved in the electrochemical reaction due to the lack of an efficient ionic transfer pathway.…”

Section: Introductionmentioning

confidence: 99%

Ionically and Electronically Conductive Phases in a Composite Anode for High-Rate and Stable Lithium Stripping and Plating for Solid-State Lithium Batteries

Zhong

Cao

Tadé

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Intensive efforts have been taken to decrease the over-potentials of solid-state lithium batteries. Lowering the anode–electrolyte interface resistance is an effective method. Compared to simply improving the interface contact, constructing both ionically and electronically conductive phases within the anode demonstrates superior improvement in reducing the interface resistance and promoting electrochemical stability. However, complex preparation procedures are usually involved in the construction of the conductive phases and the loading of metallic lithium. Herein, a composite anode containing metallic lithium and well-dispersed ionically conductive Li3N and electronically conductive components (Fe, Fe3C, and amorphous carbon) shows an effective decrease in lithium stripping/plating over-potentials at high current densities of up to 3 mA cm–2. The unique dual ionically and electronically conductive phases exhibit good cycling stability for 3000 h. A full battery with the composite anode and a LiFePO4 cathode also demonstrates decent performance. This work confirms the importance of constructing dual conductive phases that are electrochemically stable to Li and will not be consumed during the electrochemical reaction and provides a facile preparation method. The new knowledge discovered and the new methods developed in this work would inspire the future development of new Li-containing composite anodes.

show abstract

“…Dendritic growth [7,8] and corrosion of Li are common phenomena detrimental to the anode. Recent reports have shown some effective approaches to protect Li-ion anode by using solid electrolytes [9][10][11] or electrolyte additives [14,15] ; Chemical/electrochemical pre-treatments [16,17] and the addition of artificial SEI layers [12,13] also improves the stability of Li anodes. For the cathode, oxygen reduction reaction (ORR) occurs during battery discharging.…”

Section: Introductionmentioning

confidence: 99%

Dual Functional Mesoporous Silica Colloidal Electrolyte for Lithium-Oxygen Batteries

Zhuge

Ren

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

A simple strategy that may effectively tackle the anode-electrolyte interface issues in solid-state lithium metal batteries

Cited by 43 publications

References 51 publications

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

Ionically and Electronically Conductive Phases in a Composite Anode for High-Rate and Stable Lithium Stripping and Plating for Solid-State Lithium Batteries

Dual Functional Mesoporous Silica Colloidal Electrolyte for Lithium-Oxygen Batteries

Contact Info

Product

Resources

About

A simple strategy that may effectively tackle the anode-electrolyte interface issues in solid-state lithium metal batteries

Cited by 43 publications

References 51 publications

Production of Ta-Doped Li7La3Zr2O12 Solid Electrolyte with High Critical Current Density

Production of Ta-Doped Li7La3Zr2O12 Solid Electrolyte with High Critical Current Density

Ionically and Electronically Conductive Phases in a Composite Anode for High-Rate and Stable Lithium Stripping and Plating for Solid-State Lithium Batteries

Dual Functional Mesoporous Silica Colloidal Electrolyte for Lithium-Oxygen Batteries

Contact Info

Product

Resources

About

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density

Production of Ta-Doped Li₇La₃Zr₂O₁₂ Solid Electrolyte with High Critical Current Density