Open ZnSe/C nanocages: multi-hierarchy stress-buffer for boosting cycling stability in potassium-ion batteries

2020 ◽  
Vol 8 (2) ◽  
pp. 779-788 ◽  
Author(s):  
Jianhua Chu ◽  
Wei (Alex) Wang ◽  
Qiyao Yu ◽  
Cheng-Yen Lao ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Potassium Ion ◽  
Cycling Stability ◽  
Cycle Stability ◽  
Induced Stresses ◽  
Stress Buffer

The unique open ZnSe/C nanocages composed of sub-10 nm nanoparticles can dramatically reduce diffusion-induced stresses and enhance the structural integrity with multi-hierarchy stress-buffered effect, resulting in excellent cycle stability.

An iron-based polyanionic cathode for potassium storage with high capacity and excellent cycling stability

2020 ◽  
Vol 8 (18) ◽  
pp. 9128-9136 ◽  
Author(s):  
Haiyan He ◽  
Wenjiao Yao ◽  
Sarayut Tunmee ◽  
Xiaolong Zhou ◽  
Bifa Ji ◽  
...  
Keyword(s):  
High Stability ◽  
High Capacity ◽  
Potassium Ion ◽  
Cycling Stability ◽  
Positive Electrode ◽  
Ion Storage ◽  
Excellent Cycling Stability ◽  
Iron Based

KLi3Fe(C2O4)3@C is developed as a positive electrode for potassium-ion storage with high stability and long cyclability.

scholarly journals Tuning Metallic Co0.85Se Quantum Dots/Carbon Hollow Polyhedrons with Tertiary Hierarchical Structure for High-Performance Potassium Ion Batteries

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhiwei Liu ◽  
Kun Han ◽  
Ping Li ◽  
Wei Wang ◽  
Donglin He ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hierarchical Structure ◽  
Structural Integrity ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Carbon Composite ◽  
Potassium Ion ◽  
Potential Candidate ◽  
Cobalt Selenide

Abstract Potassium-ion batteries (KIBs) are a potential candidate to lithium-ion batteries (LIBs) but possess unsatisfactory capacity and rate properties. Herein, the metallic cobalt selenide quantum dots (Co0.85Se-QDs) encapsulated in mesoporous carbon matrix were designed via a direct hydrothermal method. Specifically, the cobalt selenide/carbon composite (Co0.85Se-QDs/C) possesses tertiary hierarchical structure, which is the primary quantum dots, the secondary petals flake, and the tertiary hollow micropolyhedron framework. Co0.85Se-QDs are homogenously embedded into the carbon petals flake, which constitute the hollow polyhedral framework. This unique structure can take the advantages of both nanoscale and microscale features: Co0.85Se-QDs can expand in a multidimensional and ductile carbon matrix and reduce the K-intercalation stress in particle dimensions; the micropetals can restrain the agglomeration of active materials and promote the transportation of potassium ion and electron. In addition, the hollow carbon framework buffers volume expansion, maintains the structural integrity, and increases the electronic conductivity. Benefiting from this tertiary hierarchical structure, outstanding K-storage performance (402 mAh g−1 after 100 cycles at 50 mA g−1) is obtained when Co0.85Se-QDs/C is used as KIBs anode. More importantly, the selenization process in this work is newly reported and can be generally extended to prepare other quantum dots encapsulated in edge-limited frameworks for excellent energy storage.

Boosting the potassium-ion storage performance of a carbon anode by chemically regulating oxygen-containing species

2019 ◽  
Vol 55 (94) ◽  
pp. 14147-14150 ◽  
Author(s):  
Rui Zhang ◽  
Haibo Li ◽  
Rui Li ◽  
Denghu Wei ◽  
Wenjun Kang ◽  
...  
Keyword(s):  
Rate Capability ◽  
Reversible Capacity ◽  
Potassium Ion ◽  
Cycling Stability ◽  
Carbon Anode ◽  
Storage Performance ◽  
Ion Storage ◽  
Melamine Foam

The oxygen-containing species in melamine foam carbons are chemically regulated. The optimized carbon anode shows an enhanced potassium-ion storage performance in terms of reversible capacity, rate capability, and long-term cycling stability.

An Efficient Bump Pad Design to Mitigate the Flip Chip Package Induced Stress

2015 ◽  
Author(s):  
Mario Gonzalez ◽  
Joeri De Vos ◽  
Geert Van der Plas ◽  
Eric Beyne
Keyword(s):  
Buffer Layer ◽  
Flip Chip ◽  
Finite Element Models ◽  
Test Vehicle ◽  
Solder Interconnection ◽  
Geometric Configurations ◽  
Induced Stresses ◽  
Reliability Of Solder Joints ◽  
Stress Buffer ◽  
Time Decrease

A numerical analysis using Finite Element Models of different stress buffer configurations has been proposed for improving the reliability of solder joints and at the same time decrease the induced stresses in the back-end-of-line (BEOL). A non-underfilled Flip Chip with a silicon die size of 10×10 mm2 mounted on a FR4 board has been used as test vehicle. The die to substrate interconnection is done by using copper pillars and Sn solder with a diameter of 50 μm and a total standoff of 50 μm. The thickness of the passivation, a copper pedestal fabricated as a redistribution I/O pad and a polymeric buffer layer with different geometric configurations were used in combination to minimize the induced stresses in the BEOL and increase the flexibility of the copper pillar interconnections. It was found that a stiff layer below the copper pillar has the major contribution to reduce the stress in the BEOL, while the softer buffer layer minimizes the induced plastic strain in the solder interconnection. Fabrication of the samples with optimal configuration are under progress.

Edge-nitrogen enriched carbon nanosheets for potassium-ion battery anodes with an ultrastable cycling stability

Carbon ◽  
2021 ◽  
Author(s):  
Kainian Chu ◽  
Xiaojuan Zhang ◽  
Yang Yang ◽  
Zhiqiang Li ◽  
Lingzhi Wei ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Cycling Stability ◽  
Carbon Nanosheets

Zero-strain K0.6Mn1F2.7 hollow nanocubes for ultrastable potassium ion storage

2018 ◽  
Vol 11 (10) ◽  
pp. 3033-3042 ◽  
Author(s):  
Zhiwei Liu ◽  
Ping Li ◽  
Guoquan Suo ◽  
Sheng Gong ◽  
Wei (Alex) Wang ◽  
...  
Keyword(s):  
Rate Capability ◽  
Potassium Ion ◽  
Cycling Stability ◽  
New Class ◽  
Ion Storage

In this report, we develop a new etching route to fabricate a new class of zero-strain potassium fluoromanganate hollow nanocubes (KMnF-NCs) for boosting the performance of KIBs in terms of capacity, rate capability and cycling stability.

Super long-life potassium-ion batteries based on an antimony@carbon composite anode

2018 ◽  
Vol 54 (83) ◽  
pp. 11773-11776 ◽  
Author(s):  
Qian Liu ◽  
Ling Fan ◽  
Ruifang Ma ◽  
Suhua Chen ◽  
Xinzhi Yu ◽  
...  
Keyword(s):  
Carbon Composite ◽  
Potassium Ion ◽  
Cycle Stability ◽  
Composite Anode ◽  
Capacity Retention ◽  
Long Cycle ◽  
Long Life

An Sb@G@C electrode exhibits an outstanding long cycle stability over 800 cycles with a capacity retention as high as 72.3%.

KTi 2 (PO 4 ) 3 Electrode with a Long Cycling Stability for Potassium‐Ion Batteries

Small ◽  
2020 ◽  
Vol 16 (20) ◽  
pp. 2001090
Author(s):  
Natalia Voronina ◽  
Jae Hyeon Jo ◽  
Aishuak Konarov ◽  
Jongsoon Kim ◽  
Seung‐Taek Myung
Keyword(s):  
Potassium Ion ◽  
Cycling Stability

P3-type layered K0.48Mn0.4Co0.6O2: a novel cathode material for potassium-ion batteries

2020 ◽  
Vol 56 (15) ◽  
pp. 2272-2275 ◽  
Author(s):  
Krishnakanth Sada ◽  
Prabeer Barpanda
Keyword(s):  
Cathode Material ◽  
Discharge Capacity ◽  
Potassium Ion ◽  
Cycling Stability ◽  
Type K ◽  
Excellent Cycling Stability

A P3-type K0.48Mn0.4Co0.6O2 oxide forms a 3 V economical cathode for potassium-ion batteries, having a discharge capacity of 64 mA h g−1 coupled with excellent cycling stability.

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