Improving LiNi0.9Co0.08Mn0.02O2’s cyclic stability via abating mechanical damages

Ren, Ze; Shen, Cai; Meng, Liang; Liu, Jian; Zhang, Shengqi; Gai, Ying; Huai, Liyuan; Liu, Xiaosong; Wang, Deyu; Hong, Liu

doi:10.1016/j.ensm.2020.02.028

Cited by 52 publications

(32 citation statements)

References 38 publications

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“…[ 53 ] As reported for LIBs, the non‐uniform changes along the c ‐axis, and in the ab plane, during the charging and discharging process creates a huge internal strain, which consequently cracks electrode materials. [ 54 ] In PIBs, the huge lattice change can result in severe internal strain, which will lead to more serious material cracking. For our YS‐KMNC cathode, however, it delivers an outstanding cycling stability, implying that its structural design is meritorious in that it can accommodate much more strain generated in PIBs, but further research is necessary.…”

Section: Resultsmentioning

confidence: 99%

“…This result is consistent with the observed phenomenon, that is, the layer transition metal oxide begins to crack from the inside under high voltage in LIBs. [ 54 ] Figure 4b depicts the strain profile for the yolk–shell structure. As can be seen, the center of the double‐layer structure is also subjected to a large strain, but relatively this strain is less than that experienced by the solid spherical structure.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

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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“…Numerous doping schemes, typically substituting transition metals (TM) with dopants, have been shown to improve cell performance by strengthening the structural integrity of Ni-rich layered cathodes. [18][19][20][21][22][23][24][25] Zhao et al recently reported that a Li[Ni 0.76 Co 0.10 Mn 0.14 ]O 2 cathode doped with 1 mol% Al shows much better capacity retention than an undoped cathode by mitigating microcrack formation and reinforcing bulk structural integrity. [23] Yan et al demonstrated that coating grain boundaries with Li 3 PO 4 prevents electrolyte penetration, reducing parasitic reactions between the interior primary particles and electrolyte and leading to long-term Li interaction stability.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Engineered Ni‐Rich Layered Cathode for Electric Vehicle Batteries

Kim

Park

Aishova

et al. 2021

Advanced Energy Materials

105

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density and long service life. General electromobility, which is considered necessary for the reduction of carbon emissions, requires the current EV market to grow exponentially; however, EV technology is confronted with significant performance and economic challenges, such as, limited driving range and battery durability and high battery costs, respectively. [1][2][3] These issues are directly related to the limitations of the LIBs powering EVs. Hence, improvements in the energy density and cycling stability of LIBs, as well as cost reduction, are prerequisites for envisioned general electromobility. Efforts have focused on developing high-capacity cathode materials because the overall performance of current LIBs is dictated by their cathodes. The capacity and cycle life of cathodes are generally inferior to those of graphite anodes (e.g., Li[Ni 0.8 Co 0.15 Al 0.05 ] O 2 and graphite have capacities of 200 and 360 mAh g -1 , respectively). Among the viable cathode materials for LIBs, layered Ni-rich lithium-nickel-cobalt-aluminum oxides, Li[Ni x Co y Al z ]O 2 (NCA), are the most promising materials for EV LIBs owing to their high theoretical capacity (278 mAh g -1 ) and good rate performance. [4,5] Recently, Tesla Motors adopted NCA materials in LIBs to power their Models S, X, and 3, which are capable of operating for 400-550 km per single full charge. However, to compete against internal combustion engine vehicles, EVs should have a driving range exceeding 600 km per single charge, which can be achieved by increasing the energy density of the cathode. Increasing the energy density of an NCA cathode requires increasing its relative fraction of Ni. [6] However, a highly delithiated NCA cathode, when charged to 4.3 V, suffers from structural degradation at the cathode particle surfaces owing to reaction between unstable Ni 4+ and the electrolyte that forms a deleterious NiOlike rock salt impurity phase. [7][8][9] Furthermore, Ni-rich layered cathodes (relative Ni fraction ≥ 0.8) undergo abrupt lattice contractions in the c-axis direction caused by H2→H3 phase transitions (at ≈4.15 V), which generate microcracks. [9][10][11][12][13][14][15] The severity of the microcracking increases with increasing Ni content. [14] The microcracks cause the electrolyte to penetrate the particle interior and attack inner primary particles, causing structural degradation, which leads to capacity fading and eventually to catastrophic mechanical failure. [6,7,[12][13][14][15] Moreover, this degradation triggers oxygen release from the host structure, giving riseThe Nb doping of Li[Ni 0.855 Co 0.13 Al 0.015 ]O 2 (NCA85) modifies its primary particle morphology to allow precise tailoring of its microstructure. The Nb dopant (1 mol%) elongates the primary particles and aligns them in the radial direction, creating a configuration that effectively dissipates the abrupt internal strain caused by H2↔H3 phase transitions near the charge end. The negation of the internal strain substantially improves the long-term cycling stability achieved...

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“…In addition, the proportion of Ni 2+ decreases aer coating. Because the radius of Ni 2+ is close to that of Li + , a reduction in Ni 2+ can reduce the degree of cation mixing in the material, 56 decrease the resistance of the Li + insertion/extraction process, and improve the cycling performance of the material. 57 The increased Mn 4+ proportion in SCMO@LLMO inhibits the dissolution of Mn x+ (x < 4).…”

Section: Materials Characterizationmentioning

confidence: 99%

Intelligent phase-transition MnO₂ single-crystal shell enabling a high-capacity Li-rich layered cathode in Li-ion batteries

et al. 2021

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Improving LiNi0.9Co0.08Mn0.02O2’s cyclic stability via abating mechanical damages

Cited by 52 publications

References 38 publications

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

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

Microstructure Engineered Ni‐Rich Layered Cathode for Electric Vehicle Batteries

Intelligent phase-transition MnO₂ single-crystal shell enabling a high-capacity Li-rich layered cathode in Li-ion batteries

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Improving LiNi0.9Co0.08Mn0.02O2’s cyclic stability via abating mechanical damages

Cited by 52 publications

References 38 publications

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

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

Microstructure Engineered Ni‐Rich Layered Cathode for Electric Vehicle Batteries

Intelligent phase-transition MnO2 single-crystal shell enabling a high-capacity Li-rich layered cathode in Li-ion batteries

Contact Info

Product

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

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

Intelligent phase-transition MnO₂ single-crystal shell enabling a high-capacity Li-rich layered cathode in Li-ion batteries