Constant dripping wears away a stone: Fatigue damage causing particles' cracking

Ren, Ze; Zhang, Xianhui; Li, Meng; Zhou, Jingjing; Sun, Sheng; He, Haibing; Wang, Deyu

doi:10.1016/j.jpowsour.2019.01.084

Cited by 43 publications

(34 citation statements)

References 43 publications

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“…It is well known that lithium could redeposit into the single crystals surface lattice via oxidation of the rock-salt Ni 2+ phase to layered Ni 3+ , which can restore the particle surface to a well-ordered lattice structure. Inspired by this finding, we attempted to modify the surface Nirich rock-salt phase using a feasible lithium source to replenish lattice sites during re-calcination under oxygen flow and hightemperatures (denoted as t-NCM) 42,43 . From a fundamental perspective, when the NCM is calcined at high temperature with O 2 flow, the lithium ions from LiOH could return to the lattice.…”

Section: Resultsmentioning

confidence: 99%

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Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

et al. 2020

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Single-crystal cathode materials for lithium-ion batteries have attracted increasing interest in providing greater capacity retention than their polycrystalline counterparts. However, after being cycled at high voltages, these single-crystal materials exhibit severe structural instability and capacity fade. Understanding how the surface structural changes determine the performance degradation over cycling is crucial, but remains elusive. Here, we investigate the correlation of the surface structure, internal strain, and capacity deterioration by using operando X-ray spectroscopy imaging and nano-tomography. We directly observe a close correlation between surface chemistry and phase distribution from homogeneity to heterogeneity, which induces heterogeneous internal strain within the particle and the resulting structural/performance degradation during cycling. We also discover that surface chemistry can significantly enhance the cyclic performance. Our modified process effectively regulates the performance fade issue of single-crystal cathode and provides new insights for improved design of high-capacity battery materials.

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Section: Resultsmentioning

confidence: 99%

“…single-crystal NCM materials were produced using hightemperature sintering. Mixing the NCM precursor with LiOH•H 2 O (Aladdin, 99.8%, Li: M ratio = 1.05:1), and the above mixture was then calcined at 950°C for 10 h in pure oxygen to obtain single crystal NCM 41,42,46 . t-NCM material was prepared by a simple surface regulation method.…”

Section: Methodsmentioning

confidence: 99%

Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

et al. 2020

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“…To alleviate the strain‐induced particle cracking and to obtain high packing density, a rational structural design for layered transition metal oxides is needed for PIB cathodes. [ 17‐22 ] In the case of this, we draw inspiration from the lithium‐ion batteries (LIBs). For examples, Amine et al .…”

Section: Introductionmentioning

confidence: 99%

“…To alleviate the strain-induced particle cracking and to obtain high packing density, a rational structural design for layered transition metal oxides is needed for PIB cathodes. [17][18][19][20][21][22] In the case of this, we draw inspiration from the lithium-ion batteries (LIBs). For examples, Amine et al demonstrated that if a thick shell completely encapsulates the core, the structural deterioration during electrochemical cycling can be suppressed, which consequently enhances the LIB's cycle performance; [23] likewise, Yang et al also showed that the multilayered shells around the core improve the structural stability of LIBs due to the presence of void space between the layers that act as buffer zones to accommodate charge/discharge-induced changes in volume.…”

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confidence: 99%

Yolk–Shell P3‐Type K_0.5[Mn_0.85Ni_0.1Co_0.05]O₂: A Low‐Cost Cathode for Potassium‐Ion Batteries

Hao

Xiong

Zhou

et al. 2021

Energy & Environ Materials

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Low‐cost preparation methods for cathodes with high capacity and long cycle life are crucial for commercializing potassium‐ion batteries (PIBs). Presently, the charging/discharging strain that develops in the active cathode material of PIBs causes cracks in the particles, leading to a sharp capacity fade. Here, to abate the strain release and the need for an industrially relevant process, a simple low‐cost co‐precipitation method for synthesizing yolk–shell P3‐type K0.5[Mn0.85Ni0.1Co0.05]O2 (YS‐KMNC) was reported. As cathode material for PIBs, the YS‐KMNC delivers a high reversible capacity (96 mAh g–1 at 20 mA g–1) and excellent cycle stability (80.5% retention over 400 cycles at a high current density of 200 mA g–1). More importantly, a full battery assembled with the YS‐KMNC cathode and a commercial graphite anode exhibits a high operating voltage (0.5‐3.4 V) and an excellent cycling performance (84.2% retention for 100 cycles at 100 mA g–1). Considering the low‐cost, simple production process and high performance of YS‐KMNC cathode, this work could pave the way for the commercial development of PIBs.

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“…5−8 However, with the aim of pursuing higher gravimetric and volumetric energy density, the AGr/NCM523 cells need to operate at higher voltage, whereas harmful impacts such as reduced thermal and electrochemical stabilities could be drastically induced. 9,10 The intensive side reactions at the NCM523 cathode side during high-voltage cycling are the main reason for the reduced stability of AGr/ NCM523 cells, including (i) the release of singlet oxygen which may catalyze electrolyte oxidation; 11 (ii) the continuous disintegration of secondary particles; 12 and (iii) the dissolution of transition metal ions from the cathode and deposition on the anode. 13 In addition, most of the electrolyte solvents possess higher reduction potentials than that of Li intercalation into AGr (about 0.1 V vs Li/Li + ), thus serious side reactions could also occur on the AGr anode surface if the native solid electrolyte interphase (SEI) layer is unstable.…”

Section: ■ Introductionmentioning

confidence: 99%

Simultaneous Interphase Optimizations on the Large-Area Anode and Cathode of High-Energy-Density Lithium-Ion Pouch Cells by a Multiple Additives Strategy

Zang

Fang

et al. 2020

ACS Appl. Mater. Interfaces

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Prior to the maturation of next-generation energy storage devices, the actual lithium-ion batteries for commercial purposes are still expected to fulfill some critical requirements, among which the high energy density, wide operating temperature range, and related long-term cycling stability are the most challenging issues. Herein a multiple additives strategy is employed to simultaneously optimize the solid electrolyte interphase on the large-area anode and cathode in a 2 Ah artificial graphite (AGr)/LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) pouch cell with high gravimetric (>260 Wh kg −1 ) and volumetric (>630 Wh L −1 ) energy density. By introducing a rational mixture of electrolyte additives, a highly sulfurized surface layer and a uniform and thin passivation layer are separately formed on the anode and cathode of the AGr/NCM523 pouch cell, exhibiting high storage stability at 60 °C, much improved discharge capacity at −10 and −20 °C, high anodic stability at high voltage of 4.4 V, and stable cyclic performance with a capacity retention of 85.5% after 500 cycles, significantly outperforming the value of 75.7% after only 200 cycles of the cell without additional additives. These results demonstrate the critical effect of simultaneous optimizations of anode and cathode interphase layers to construct stable high-energy-density lithium-ion pouch cells.

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Constant dripping wears away a stone: Fatigue damage causing particles' cracking

Cited by 43 publications

References 43 publications

Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

Yolk–Shell P3‐Type K_0.5[Mn_0.85Ni_0.1Co_0.05]O₂: A Low‐Cost Cathode for Potassium‐Ion Batteries

Simultaneous Interphase Optimizations on the Large-Area Anode and Cathode of High-Energy-Density Lithium-Ion Pouch Cells by a Multiple Additives Strategy

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Constant dripping wears away a stone: Fatigue damage causing particles' cracking

Cited by 43 publications

References 43 publications

Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage

Yolk–Shell P3‐Type K0.5[Mn0.85Ni0.1Co0.05]O2: A Low‐Cost Cathode for Potassium‐Ion Batteries

Simultaneous Interphase Optimizations on the Large-Area Anode and Cathode of High-Energy-Density Lithium-Ion Pouch Cells by a Multiple Additives Strategy

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Product

Resources

About

Yolk–Shell P3‐Type K_0.5[Mn_0.85Ni_0.1Co_0.05]O₂: A Low‐Cost Cathode for Potassium‐Ion Batteries