Directing lateral growth of lithium dendrites in micro-compartmented anode arrays for safe lithium metal batteries

Zou, Peichao; Yang, Wang; Chiang, Sum Wai; Wang, Xuanyu; Kang, Feiyu; Yang, Cheng

doi:10.1038/s41467-018-02888-8

Cited by 285 publications

(184 citation statements)

References 37 publications

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“…[20,27,40] Normally, Li + prefers to accumulate on the protrusion surface rather than flat region, resulting in nonuniform Li + concentration on the surface. Due to the microscopic roughness or tiny protrusions on the surface of current collector, electric field distribution is distorted when close to these high curvature radius region.…”

Section: Resultsmentioning

confidence: 99%

“…The voltage hysteresis of the sample without magnetic field is relatively high. [40,62] In order to further explore the potential applications, 3D Cu/ NiCo deposited with limited lithium metal (2.5 mAh) was used as the anode and LFP was used as the cathode to make the full cell for electrochemical tests. Ultimately, the process of delithiation becomes difficult and the battery cannot be recycled anymore.…”

Section: Resultsmentioning

confidence: 99%

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Magnetic Field–Suppressed Lithium Dendrite Growth for Stable Lithium‐Metal Batteries

Shen

Wang

et al. 2019

Advanced Energy Materials

233

135

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for the battery technologies. However, the main impediment for the practical application of lithium metal batteries is the lithium dendrite formation. [5] It not only penetrates the separator to induce the short circuit of the batteries, [6] but also generates high surface area in the anode to accelerate the unwanted side reactions between electrolytes and lithium metal, resulting in the electrolyte depletion and the subsequent battery failure. [7][8][9] Up to now, many strategies targeting lithium dendrites suppression rely on the "internal strategies," i.e., the modification or optimization of the components inside the cells. Those strategies include electrolyte optimization, artificial solid electrolyte interphase (SEI) design, and synthesis of 3D current collector. [1] Electrolyte additives such as LiF, [10] LiNO 3 , [11] and Li 2 S x [12] were chosen to form stable SEI on the surface of Li anode to suppress the dendrite growth. [13] For creating artificial SEI layer on the anode, gas treatment [14] (N 2 , O 2 , CO 2 , or SO 2 ), liquid treatment (Li 3 PO 4[15] and Cu 3 N/styrene−butadiene rubber [16] ), and physical deposition of nanofilm (Al 2 O 3 , [17] carbon, [18] and organic polymer [19] ) are the three typical methods by accessing the internal interface of the battery. The rational design of 3D current collectors also helps to inhibit dendritic growth. [20] One type of 3D current collectors is lithiophilic matrix such as lithiophilic-lithiophobic gradient interfacial layer, [21] N-doped graphene, [22] and metal−organic framework, [23] which redistributes Li-ions to the anode surface through chemical bonding interactions to achieve uniform lithium deposition. The other type is conductive matrix including porous carbon, [7] graphene matrix, [24] 3D-ordered macroporous Cu, [25] and fibrous metal felt [26] that reduces dendritic growth by reducing the current density with a large surface area. [27,28] Although these "internal strategies" could effectively suppress the dendrite formation, cell stability becomes a concern due to the change of the cell environment such as the use of additives and the modification of the electrode.Introducing an "external strategy," by using external magnetic field to rearrange the Li + concentration on the anode surface, could achieve a uniform lithium deposition. The latest study shows that the growth of Li dendrites stems from the nonuniform Li + concentration on the electrode surface. [29] Lithium metal is the most attractive anode material due to its extremely high specific capacity, minimum potential, and low density. However, uncontrollable growth of lithium dendrite results in severe safety and cycling stability concerns, which hinders the application in next generation secondary batteries. In this paper, a new and facile method imposing a magnetic field to lithium metal anodes is proposed. That is, the lithium ions suffering Lorentz force due to the electromagnetic fields are put into spiral motion causing magnetohydrodynamics (MHD) effect. This MHD effect can effecti...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Magnetic Field–Suppressed Lithium Dendrite Growth for Stable Lithium‐Metal Batteries

Shen

Wang

et al. 2019

Advanced Energy Materials

233

135

View full text Add to dashboard Cite

show abstract

“…To further prove the stability of "electrode-electrolyte" interfaces, the electrochemical impendence spectroscopy of symmetric cells using different separators were measured before and aer 10,20,30,40,50,60,70,80,90 and 100 cycles at 1 mA cm…”

Section: à2mentioning

confidence: 99%

A bidirectional growth mechanism for a stable lithium anode by a platinum nanolayer sputtered on a polypropylene separator

et al. 2018

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The issue of uncontrollable Li dendrite growth, caused by irregular lithium deposition, restricts the wide applications of Li metal based high energy batteries. In this paper, a polypropylene separator with a sputtered platinum nanolayer has been developed to improve the stability of the Li metal anodes. It was found that cells using the modified separators resulted in a smooth Li surface and a stable "electrode-electrolyte" interface. On the one hand, platinum nanolayers can enhance the mechanical properties and micro-structures of commercial polypropylene separators. On the other hand, platinum nanolayers provide stable Li deposition during repeated charging/discharging by a bidirectional growth mechanism. After long-time cycling, the dendrites from opposite directions and dead Li are integrated into a flat and dense new-formed Li anode, decreasing the risk of low Coulombic efficiency and cycling instability that may end in cell failure. This design may provide new ideas in next-generation energy storage systems for advanced stable metallic battery technologies.

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“…[2,3] AL i-O 2 battery usually consists of al ithium metal anode,a ne lectrolyte and aporous air electrode.Thus far, much attention has been paid to electrolyte and air electrodes to enhance the electrochemical properties of Li-O 2 batteries to the expected level. [7][8][9][10][11][12][13] The instability of the recurring Li accommodation and Li/electrolyte interface also results in side reactions and loss of Li during cycling, which degrades the cycling efficiency of Li-O 2 batteries with poor performances. Thef ormation of Li dendrites during discharge/ charge processes leads to serious safety problems.…”

mentioning

confidence: 99%

Stabilizing Lithium into Cross‐Stacked Nanotube Sheets with an Ultra‐High Specific Capacity for Lithium Oxygen Batteries

et al. 2019

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Although lithium-oxygen batteries possess ah igh theoretical energy density and are considered as promising candidates for next-generation power systems,t he enhancement of safety and cycling efficiency of the lithium anodes while maintaining the high energy storage capability remains difficult. Here,w eo vercome this challenge by cross-stacking aligned carbon nanotubes into porous networks for ultrahighcapacity lithium anodes to achieve high-performance lithiumoxygen batteries.T he novel anode shows ar eversible specific capacity of 3656 mAh g À1 ,approaching the theoretical capacity of 3861 mAh g À1 of pure lithium. When this anode is employed in lithium-oxygen full batteries,t he cycling stability is significantly enhanced, owingt ot he dendrite-free morphology and stabilized solid-electrolyte interface.This work presents anew pathway to high performance lithium-oxygen batteries towards practical applications by designing cross-stacked and aligned structures for one-dimensional conducting nanomaterials.

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Directing lateral growth of lithium dendrites in micro-compartmented anode arrays for safe lithium metal batteries

Cited by 285 publications

References 37 publications

Magnetic Field–Suppressed Lithium Dendrite Growth for Stable Lithium‐Metal Batteries

Magnetic Field–Suppressed Lithium Dendrite Growth for Stable Lithium‐Metal Batteries

A bidirectional growth mechanism for a stable lithium anode by a platinum nanolayer sputtered on a polypropylene separator

Stabilizing Lithium into Cross‐Stacked Nanotube Sheets with an Ultra‐High Specific Capacity for Lithium Oxygen Batteries

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