Tuning the component ratio and corresponding sodium storage properties of layer-tunnel hybrid Na0.6Mn1-Ni O2 cathode by a simple cationic Ni2+ doping strategy

Chen, Hui; Wu, Zhenguo; Zheng, Zhuo; Chen, Tingru; Guo, Xiaodong; Li, Jun‐Tao; Zhong, Benhe

doi:10.1016/j.electacta.2018.04.006

Cited by 27 publications

(21 citation statements)

References 35 publications

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“…Furthermore, no impurity peaks were generated when this material was either exposed to air or soaked in water, demonstrating its good structure stability . Very recently, CSMs with the same structure, i.e., Na 0.6 Mn 1− x Ni x O 2 ( x = 0, 0.025, 0.005, and 0.075), based on Ni doping with P2‐type and tunnel‐type structures were reported . Similar to the Na 0.6 Mn 1− x Cu x O 2 materials, the tunnel‐type structure is also obviously suppressed by the Ni content, and this material becomes a P2‐type structure when x = 0.075.…”

Section: Structure Design and Adjustment Of Csmsmentioning

confidence: 83%

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Composite‐Structure Materials for Na‐Ion Batteries

2018

Small Methods

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structure materials, [25][26][27][28][29][30][31][32][33] polyanion-based materials, [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] alloying materials, [9,[51][52][53][54][55][56] and Prussian blue analogs. [57][58][59][60][61] However, most of these developed materials are classified as single crystalline structures and exhibit limited electrochemical performances. Thus, scientists have started to think about developing a new material system that possesses the advantages of multiple materials in one material. An attractive strategy to accomplish this goal is the composite-structure material system, which has received much attention recently. [62][63][64] Compared with single-structure materials, compositestructure materials (CSMs) always exhibit better comprehensive electrochemical performance, e.g., larger reversible capacities and better cycling or rate performance. [65,66] The best example of a CSM has been studied in LIBs for many years, i.e., lithium-manganese-rich layered oxides (LLOs), [67][68][69][70] which possess both layered rhombohedral structures and mono clinic Li 2 MnO 3 -like structures. These CSMs deliver a high discharge capacity of ≈300 mAh g −1 and a high energy density of ≈1000 Wh kg −1 , which are almost two times larger than those of conventional cathode materials for LIBs.Electrode materials for NIBs are mostly derived from LIBs. Recently, some CSMs have been proposed to create NIBs with high electrochemical performance, exhibiting great potential in high-energy-density devices. However, most published CSMs are identified after the synthesis process, and few studies have been conducted on designing CSMs because of the complexity of their crystalline structure. In addition, characterizing all the structures in CSMs is more difficult than characterizing singlestructure materials. Currently, adjusting structural proportions and further balancing the electrochemical performance of CSMs still remain major challenges. Examining the literature, a detailed review of CSMs used in NIBs is lacking. In this work, research development of CSMs for NIBs is conducted based on the crystalline structure, including structure design, identification, and adjustment. Some important work and recent achievements on CSMs with a future outlook based on a mechanism analysis are also reviewed. By reviewing previous important studies on CSMs, a new electrode-material structure system for NIBs is established in this work. Structures in CSMsMost NIB electrode materials are developed based on LIB materials because the batteries have similar mechanisms. [1,3,4] Due to the growing concern of aggravated environmental problems (air pollution, global warming, etc.) and Li resources, Na-ion batteries have received significant attention as a promising alternative. Many electrode materials for Na-ion batteries have been reported in the past, especially over the past five years. However, most of these materials have a single crystalline structure and exhibit a limited electrochemical performance. Recently,...

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Section: Structure Design and Adjustment Of Csmsmentioning

confidence: 83%

Section: Structure Design and Adjustment Of Csmsmentioning

confidence: 99%

Composite‐Structure Materials for Na‐Ion Batteries

2018

Small Methods

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“…Combining density functional theory (DFT) calculations and reaction kinetic evaluation, the enhanced rate performance is explained by the current redistribution effect of the active materials, which helps to reduce polarization at high current density. A step further, Wu and co‐workers studied the influence induced by substitution of Mn with Ni 2+ , Cu 2+ , Zr 4+ , and optimized the crystal and elemental composition of a hybrid cathode (Figure d–f) . The investigation results suggest that Ni 2+ only replaces the Mn ions within the layered structure, and the rest of Ni 2+ forms into additional layered oxides of their own.…”

Section: Sibsmentioning

confidence: 99%

Section: Sibsmentioning

confidence: 99%

Layer‐Based Heterostructured Cathodes for Lithium‐Ion and Sodium‐Ion Batteries

Deng

Liang

et al. 2019

Adv Funct Materials

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A critical bottleneck that hinders major performance improvement in lithium-ion and sodium-ion batteries is the inferior electrochemical activity of their cathode materials. While significant research progresses have been made, conventional single-phase cathodes are still limited by intrinsic deficiencies such as low reversible capacity, enormous initial capacity loss, rapid capacity decay, and poor rate capability. In the past decade, layer-based heterostructured cathodes acquired by combining multiple crystalline phases have emerged as candidates with a huge potential to realize performance breakthrough. Herein, recent studies on the structural properties, electrochemical behaviors, and synthesis route optimizations of these heterostructured cathodes are summarized for in-depth discussions. Particular attention is paid to the latest mechanism discoveries and performance achievements. This review thus aims to promote a deeper understanding of the correlation between the crystal structure of cathodes and their electrochemical behavior, and offers guidance to design advance cathode materials from the aspect of crystal structure engineering.

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“…Previously, we have reported the electrochemical performance of layer‐tunnel hybrid Na 0.6 Mn 1− x Ni x O 2 ( x

<

0.1) as a cathode material for sodium batteries . In this work, a strategy about how to design the synergies effect with particle in SIBs composite material was proposed.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Component Ratio and Particle Size Optimization for High‐Performance and High Tap Density P2/P3 Composite Cathode of Sodium‐Ion Batteries

et al. 2019

Self Cite

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The composite structure materials in sodium-ion batteries (SIBs) have received increasing attentions due to the synergistic effect. P2/P3 composite cathode with the advantages of high reversible capacity and superior reaction kinetics was regarded as one of the promising cathodes for SIBs. Crystal phase component ratio and particle morphology of hybrid structures are closely related with the electrochemical performance, especially the energy density. Herein, P2/P3 hybrid structure materials Na 0.6 Mn 1-x Ni x O 2 were synthesized by co-precipitation method. Furthermore, the component ratio and particle size are tuned and realized via simple Ni 2 + content optimization. The targeted sample Na 0.6 Mn 0.75 Ni 0.25 O 2 shows high tap density over 1.2 g cm À 3 and excellent electrical properties with an initial capacity of 101.36 mA h g À 1 at 0.2 C, corresponding to a high volumetric energy density of 512 Wh L À 1 based on the cathode active material. Moreover, the long-term cycling capacity retention can reach 68 % at 1 C after 500 cycles. The present study develops a promising cathode of SIBs that maybe applied in low-speed electric vehicles. And the simultaneous optimization design represents a potential route for the regulation of composite structures to obtain high performance SIBs.

show abstract

Tuning the component ratio and corresponding sodium storage properties of layer-tunnel hybrid Na0.6Mn1-Ni O2 cathode by a simple cationic Ni2+ doping strategy

Cited by 27 publications

References 35 publications

Composite‐Structure Materials for Na‐Ion Batteries

Composite‐Structure Materials for Na‐Ion Batteries

Layer‐Based Heterostructured Cathodes for Lithium‐Ion and Sodium‐Ion Batteries

Simultaneous Component Ratio and Particle Size Optimization for High‐Performance and High Tap Density P2/P3 Composite Cathode of Sodium‐Ion Batteries

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