---
title: At battery facets, solar interfaces and solvent benches, small surfaces decide performance
description: Four ChemRxiv preprints show how lithium balance at cathode facets, halide traps in solar transport layers, solvent stability for carbon capture and unmeasured contaminants in recycled feedstocks shape energy materials.
canonical: https://hangingcontext.com/stories/2026-11-03/batteries-carbon-microscopic/
last-updated: 2026-11-03
url: https://hangingcontext.com/stories/2026-11-03/batteries-carbon-microscopic/
published: 2026-11-03T01:05:07Z
edition: 2026-11-03T00
newsroom: energy-climate
beat: None
trust: confirmed
source_count: 4
cited_manifest_ids: ['1793625236267453592', '1793627125291619760', '1793627831258882998', '1793624317263695954']
---

# At battery facets, solar interfaces and solvent benches, small surfaces decide performance

*Four ChemRxiv preprints show how lithium balance at cathode facets, halide traps in solar transport layers, solvent stability for carbon capture and unmeasured contaminants in recycled feedstocks shape energy materials.*

Confirmed · 4 Manifests · Energy & Climate · Published 2026-11-03 01:05 UTC

## Key facts

- In a preprint, lithium-balanced textured lithium cobalt oxide electrodes suppress kinetically driven degradation at (110) terminating facets, while lithium-poor cathodes degrade rapidly through rocksalt formation and lithium-rich electrodes degrade through formation of poorly conducting lithium carbonate. (self-reported) [cites: 1793625236267453592]
- In a preprint, mobile halide species including iodide, iodine and polyiodides form deep electron traps in C60 electron transport layers, and ammonium halide surface passivation treatments can cause performance losses within 30 minutes of operation. (self-reported) [cites: 1793627125291619760]
- In a preprint, COSMO-RS screening identifies promising deep eutectic solvent candidates for carbon dioxide capture but requires experimental validation, since one predicted liquid system forms a stable liquid phase while another predicted system decomposes and fails to form a stable liquid phase experimentally. (self-reported) [cites: 1793627831258882998]
- In a preprint reviewing 96 studies, untreated plastic pyrolysis oil and naphtha blends increase coke formation 2.4-fold compared with standard naphtha, current gas chromatography methods account for approximately 11 percent of total silicon content, and olefin estimates vary by 7.4 percentage points across the literature. (self-reported) [cites: 1793624317263695954]
- In a preprint, two-step vapor-deposited perovskites show higher sensitivity to air-induced performance losses than spin-coated perovskites. (self-reported) [cites: 1793627125291619760]

## Lithium balance at the cathode facet

In a preprint posted to ChemRxiv, researchers examine textured lithium cobalt oxide battery electrodes and find that performance depends less on bulk composition than on lithium balance at fast-diffusing facets. Lithium-balanced textured electrodes suppress kinetically driven degradation pathways at (110) terminating facets. That balance is the central result: the same electrode material behaves differently depending on whether lithium content at the surface is held near balance, pushed low, or pushed high. [cites: 1793625236267453592]

The two failure modes reported in the preprint are distinct, which is why a single fix is unlikely to cover both. Lithium-poor textured cathodes show accelerated interfacial degradation through rapid rocksalt formation. Lithium-rich textured electrodes show elevated interfacial degradation through formation of poorly conducting lithium carbonate. The authors present precise control of lithium stoichiometry as a route to cathodes with better cycle life and surface stability. The practical implication is that electrode design must control the facet interface, not only the average lithium content of the material. [cites: 1793625236267453592]

## Traps in the solar transport layer

In a second preprint posted to ChemRxiv, the vulnerable interface sits in a perovskite solar cell, in the fullerene electron transport layer. Mobile halide species generated during perovskite fabrication and passivation, including iodide, iodine and polyiodides, form deep electron traps in C60 transport layers. Those traps interfere with charge extraction, so a cell can lose performance even when its light-absorbing layer is sound. The problem is created in part by steps meant to help: ammonium halide surface passivation treatments can cause performance losses within 30 minutes of operation. [cites: 1793627125291619760]

> **From Synorb** — Run the cited Manifests yourself. Every claim in this paper points to a Manifest id. Get a Synorb Key and read the Manifests behind it. The 72 Hour Agent Demo key needs no email. It lasts 72 hours and can pull up to 25 Manifests. It includes 5 Beacons; all of them are starter Beacons. [Get a key](https://synorb.com/connect/start)


Fabrication route changes how exposed a device is to that damage. Two-step vapor-deposited perovskites exhibit higher sensitivity to air-induced performance losses compared with spin-coated perovskites. That comparison gives device engineers a concrete variable to control, alongside passivation chemistry and transport layer choice. It also shows why stability testing must track the interface over operating time, since a treatment that looks helpful at fabrication can turn into a trap-forming step once the device runs. [cites: 1793627125291619760]

## Carbon capture solvents need bench checks

In a third preprint posted to ChemRxiv, researchers test an iterative workflow for finding deep eutectic solvents for carbon dioxide capture, combining COSMO-RS computational screening with experimental solid-liquid equilibrium validation. The screening step is effective at identifying promising candidates and reducing experimental effort. But the preprint stresses that screening alone is not enough, because computational prediction can overstate stability and miss decomposition and metastable behaviour that only bench testing reveals. [cites: 1793627831258882998]

The contrast between two candidate systems makes the point. One system, based on betaine and triethanolamine, forms a stable liquid phase suitable for carbon dioxide capture applications. Another system, based on betaine and monoethanolamine, was predicted to be liquid at ambient conditions but decomposes experimentally and fails to form a stable liquid phase. A third system, based on L-tryptophan and monoethanolamine, shows a liquidus temperature prediction error of approximately 2 kelvin, which sits within the 3 kelvin experimental uncertainty. The workflow therefore works best as a filter followed by a check, not as a replacement for the check. [cites: 1793627831258882998]

## Recycled oils and the limits of current analysis

In a fourth preprint posted to ChemRxiv, a systematic review of 96 studies examines plastic pyrolysis oils as steam cracker feedstocks, a chemical recycling route rather than a battery or carbon capture process, but one governed by the same interface problem. Untreated pyrolysis oil and naphtha blends result in a 2.4-fold increase in coke formation compared with standard naphtha, an operational risk for cracker reliability. Current gas chromatography-based analytical methods account for approximately 11 percent of total silicon content, leaving most silicon unassigned by that route. Olefin estimates for the oils vary by 7.4 percentage points across existing literature despite high pooled correlation coefficients. [cites: 1793624317263695954]

The authors present the review as a framework for standardising feed qualification, so that industrial operating reliability does not rest on incomplete analysis. The gap is practical: if coking risk and contaminant content cannot be measured consistently, a feedstock that looks acceptable on paper can still foul equipment in operation. That lesson echoes the battery and solar findings. In each case, bulk averages hide the small-scale behaviour that determines whether a material survives real use. [cites: 1793624317263695954]

## The shared lesson

Across all four preprints, progress is decided at facets, transport layers, solvent phases and feedstock interfaces, not by headline composition alone. Lithium balance protects a cathode facet, halide control protects a solar transport layer, experimental validation protects a solvent choice, and fuller analysis protects a recycling feedstock. Each study also leaves its next test open: cycle life at scale for balanced cathodes, operating lifetime for trap-resistant solar cells, capture performance under real conditions for validated solvents, and a qualification standard that plants can apply to recycled oils. The common thread is modest and useful. Measure the interface, test it under operating conditions, and do not trust a bulk number to stand in for either. [cites: 1793625236267453592, 1793627125291619760, 1793627831258882998, 1793624317263695954]

## What is still unresolved

- Whether lithium-balanced textured cathodes sustain cycle life at manufacturing scale
- How trap-resistant perovskite designs perform over long operating lifetimes
- How validated deep eutectic solvents perform under real carbon capture conditions
- What qualification standard will reliably screen pyrolysis oils for cracker use
- How the findings change after peer review

## Decision card

- **Useful for:** Battery and materials researchers; Carbon capture solvent developers; Chemical recycling and solar device engineers
- **Not for:** Investment or purchasing decisions; Plant-scale operating decisions based on a single preprint
- **Compare against:** Bulk-composition battery design; Solvent screening without experimental validation; Steam cracker feeds qualified by standard assays alone

## Provenance ledger

| Manifest id | Title | Source | Claims used | Published |
|---|---|---|---|---|
| `1793625236267453592` | Revealing the role of Li content on the structural stability of textured LiCoO2 battery electrodes along fast diffusing directions | [chemrxiv-batteries-energy-storage](https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011516/v1) | 1793625594293831552, 1793625594295375841, 1793625594297391336 | 11-02 00:00 |
| `1793627125291619760` | Negative effects of oxygen and halogen species on charge extraction in perovskite solar cells with fullerene electron transport layers | [chemrxiv-materials-polymers-soft-matter](https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011526/v1) | 1793627359136633272, 1793627359138007162, 1793627359139468239 | 11-02 00:00 |
| `1793627831258882998` | COSMO-RS screening and experimental solid-liquid equilibrium validation of eutectic solvent candidates for CO2 capture | [chemrxiv-ai-ml-automation](https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011529/v1) | 1793628171455519920, 1793628171457659677, 1793628171458816656, 1793628171459604306 | 11-02 00:00 |
| `1793624317263695954` | Analytical Evidence for Assessing Plastic Pyrolysis Oils as Steam Cracker Feedstocks | [chemrxiv-analytical-sensing-diagnostics](https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011518/v1) | 1793624785492067730, 1793624785499555225, 1793624785504842766 | 11-02 00:00 |

## Run these Manifests yourself

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Cited Manifest ids:

- `1793625236267453592`
- `1793627125291619760`
- `1793627831258882998`
- `1793624317263695954`

```sh
for id in 1793625236267453592 1793627125291619760 1793627831258882998 1793624317263695954; do
  curl -s -H "Authorization: Bearer $SYNORB_KEY" "https://api.synorb.com/manifests/by-id/$id"
done
```

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